[DEBUG] [08/02/2025 00:45:27.173] [main] [EventStream(akka://test)] logger log1-TestEventListener started 12:45:27,174 AM [test-akka.actor.default-dispatcher-6] [INFO] Slf4jLogger - Slf4jLogger started [DEBUG] [08/02/2025 00:45:27.174] [main] [EventStream(akka://test)] logger log2-Slf4jLogger started [DEBUG] [08/02/2025 00:45:27.174] [main] [EventStream(akka://test)] Default Loggers started [INFO] [08/02/2025 00:45:27.184] [main] [ArteryTransport(akka://test)] Remoting started with transport [Artery tcp]; listening on address [akka://test@10.30.170.253:25520] with UID [4499665293000281555] 12:45:27,184 AM [test-akka.actor.default-dispatcher-6] [INFO] ArteryTransport - Remoting started with transport [Artery tcp]; listening on address [akka://test@10.30.170.253:25520] with UID [4499665293000281555] 12:45:27,186 AM [test-akka.actor.default-dispatcher-5] [INFO] Cluster - Cluster Node [akka://test@10.30.170.253:25520] - Starting up, Akka version [2.6.21] ... 12:45:27,188 AM [test-akka.actor.default-dispatcher-5] [INFO] Cluster - Cluster Node [akka://test@10.30.170.253:25520] - Registered cluster JMX MBean [akka:type=Cluster] 12:45:27,188 AM [test-akka.actor.default-dispatcher-5] [INFO] Cluster - Cluster Node [akka://test@10.30.170.253:25520] - Started up successfully 12:45:27,188 AM [test-akka.actor.default-dispatcher-5] [INFO] Cluster - Cluster Node [akka://test@10.30.170.253:25520] - No downing-provider-class configured, manual cluster downing required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#downing 12:45:27,188 AM [test-akka.actor.default-dispatcher-5] [INFO] Cluster - Cluster Node [akka://test@10.30.170.253:25520] - No seed-nodes configured, manual cluster join required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#joining [INFO] [08/02/2025 00:45:27.185] [main] [Cluster(akka://test)] Cluster Node [akka://test@10.30.170.253:25520] - Starting up, Akka version [2.6.21] ... [INFO] [08/02/2025 00:45:27.187] [main] [Cluster(akka://test)] Cluster Node [akka://test@10.30.170.253:25520] - Registered cluster JMX MBean [akka:type=Cluster] [INFO] [08/02/2025 00:45:27.187] [main] [Cluster(akka://test)] Cluster Node [akka://test@10.30.170.253:25520] - Started up successfully [INFO] [08/02/2025 00:45:27.187] [test-akka.actor.internal-dispatcher-2] [Cluster(akka://test)] Cluster Node [akka://test@10.30.170.253:25520] - No downing-provider-class configured, manual cluster downing required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#downing [INFO] [08/02/2025 00:45:27.188] [test-akka.actor.internal-dispatcher-2] [Cluster(akka://test)] Cluster Node [akka://test@10.30.170.253:25520] - No seed-nodes configured, manual cluster join required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#joining 12:45:27,200 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:27,200 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [follower-2, follower-1] 12:45:27,200 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-2: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,200 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-1: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,200 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): Term 2 in "AppendEntriesReply [term=2, success=true, followerId=follower-1, logLastIndex=2, logLastTerm=2, forceInstallSnapshot=false, needsLeaderAddress=false, payloadVersion=0, raftVersion=5, recipientRaftVersion=5]" message is greater than leader's term 1 - switching to Follower 12:45:27,200 AM [main] [DEBUG] DefaultConfigParamsImpl - No custom RaftPolicy specified. Using DefaultRaftPolicy 12:45:27,200 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader) :- Switching from behavior IsolatedLeader to Follower, election term: 2 12:45:27,200 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior555#1116830324] 12:45:27,200 AM [test-akka.actor.default-dispatcher-5] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader556#-1244826974] to Actor[akka://test/user/$b] was not delivered. [1] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$b] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,200 AM [test-akka.actor.default-dispatcher-5] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader556#-1244826974] to Actor[akka://test/user/$a] was not delivered. [2] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$a] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [WARN] [08/02/2025 00:45:27.200] [test-akka.actor.default-dispatcher-11] [akka://test/user/$b] received dead letter from Actor[akka://test/user/leader556#-1244826974]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] [WARN] [08/02/2025 00:45:27.200] [test-akka.actor.default-dispatcher-11] [akka://test/user/$a] received dead letter from Actor[akka://test/user/leader556#-1244826974]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] [INFO] [akkaDeadLetter][08/02/2025 00:45:27.200] [test-akka.actor.default-dispatcher-6] [akka://test/user/$b] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader556#-1244826974] to Actor[akka://test/user/$b] was not delivered. [1] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$b] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [INFO] [akkaDeadLetter][08/02/2025 00:45:27.200] [test-akka.actor.default-dispatcher-6] [akka://test/user/$a] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader556#-1244826974] to Actor[akka://test/user/$a] was not delivered. [2] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$a] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,211 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader556#-1244826974] 12:45:27,211 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender557#-1842726183] 12:45:27,213 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:27,214 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [follower-2, follower-1] 12:45:27,214 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-2: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,214 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-1: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 [WARN] [08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-11] [akka://test/user/$b] received dead letter from Actor[akka://test/user/leader559#116775784]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] [WARN] [08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-11] [akka://test/user/$a] received dead letter from Actor[akka://test/user/leader559#116775784]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,214 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): handleAppendEntriesReply: follower follower-1 last log term 0 for index 0 conflicts with the leader's 1 - set the follower's next index to -1 [INFO] [akkaDeadLetter][08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-5] [akka://test/user/$b] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$b] was not delivered. [3] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$b] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,214 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-1: active: true, followerNextIndex: -1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,214 AM [test-akka.actor.default-dispatcher-6] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$b] was not delivered. [3] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$b] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,214 AM [test-akka.actor.default-dispatcher-6] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$a] was not delivered. [4] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$a] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,214 AM [main] [INFO] MockRaftActorContext - IsolatedLeader isolated-leader switching from IsolatedLeader to Leader 12:45:27,214 AM [test-akka.actor.default-dispatcher-6] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$a] was not delivered. [5] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$a] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [INFO] [akkaDeadLetter][08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-5] [akka://test/user/$a] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$a] was not delivered. [4] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$a] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,214 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Election: Leader has following peers: [follower-2, follower-1] [WARN] [08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-11] [akka://test/user/$a] received dead letter from Actor[akka://test/user/leader559#116775784]: AppendEntries [leaderId=isolated-leader, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]] [INFO] [akkaDeadLetter][08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-5] [akka://test/user/$a] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$a] was not delivered. [5] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$a] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,214 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Checking sendAppendEntries for follower follower-2: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,214 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Checking sendAppendEntries for follower follower-1: active: true, followerNextIndex: -1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,214 AM [main] [DEBUG] DefaultConfigParamsImpl - No custom RaftPolicy specified. Using DefaultRaftPolicy 12:45:27,214 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader) :- Switching from behavior IsolatedLeader to Leader, election term: 1 12:45:27,214 AM [main] [INFO] MockRaftActorContext - isolated-leader (Leader): handleAppendEntriesReply: follower follower-2 last log term 0 for index 0 conflicts with the leader's 1 - set the follower's next index to -1 [WARN] [08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-11] [akka://test/user/$b] received dead letter from Actor[akka://test/user/leader559#116775784]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,214 AM [test-akka.actor.default-dispatcher-5] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$b] was not delivered. [6] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$b] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,215 AM [test-akka.actor.default-dispatcher-5] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$a] was not delivered. [7] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$a] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,215 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Checking sendAppendEntries for follower follower-2: active: true, followerNextIndex: -1, leaderLastIndex: 1, leaderSnapShotIndex: -1 [INFO] [akkaDeadLetter][08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-6] [akka://test/user/$b] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$b] was not delivered. [6] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$b] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [WARN] [08/02/2025 00:45:27.215] [test-akka.actor.default-dispatcher-11] [akka://test/user/$a] received dead letter from Actor[akka://test/user/leader559#116775784]: AppendEntries [leaderId=isolated-leader, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,215 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior558#-1346124410] [INFO] [akkaDeadLetter][08/02/2025 00:45:27.214] [test-akka.actor.default-dispatcher-6] [akka://test/user/$a] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$a] was not delivered. [7] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$a] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,215 AM [test-akka.actor.default-dispatcher-5] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$b] was not delivered. [8] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$b] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [WARN] [08/02/2025 00:45:27.215] [test-akka.actor.default-dispatcher-11] [akka://test/user/$b] received dead letter from Actor[akka://test/user/leader559#116775784]: AppendEntries [leaderId=isolated-leader, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]] [INFO] [akkaDeadLetter][08/02/2025 00:45:27.215] [test-akka.actor.default-dispatcher-5] [akka://test/user/$b] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader559#116775784] to Actor[akka://test/user/$b] was not delivered. [8] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$b] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,225 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader559#116775784] 12:45:27,225 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender560#-657312407] 12:45:27,227 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:27,227 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [follower-4, follower-3, follower-2, follower-1] 12:45:27,227 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-4: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,227 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-3: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,227 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-2: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,227 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-1: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,227 AM [test-akka.actor.default-dispatcher-6] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader562#-102391403] to Actor[akka://test/user/$d] was not delivered. [9] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$d] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [WARN] [08/02/2025 00:45:27.227] [test-akka.actor.default-dispatcher-11] [akka://test/user/$d] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,227 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): handleAppendEntriesReply: follower follower-1 last log term 0 for index 0 conflicts with the leader's 1 - set the follower's next index to -1 [WARN] [08/02/2025 00:45:27.227] [test-akka.actor.default-dispatcher-11] [akka://test/user/$c] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,228 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-1: active: true, followerNextIndex: -1, leaderLastIndex: 1, leaderSnapShotIndex: -1 [INFO] [akkaDeadLetter][08/02/2025 00:45:27.227] [test-akka.actor.default-dispatcher-5] [akka://test/user/$d] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader562#-102391403] to Actor[akka://test/user/$d] was not delivered. [9] dead letters encountered. If this is not an expected behavior then Actor[akka://test/user/$d] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-11] [akka://test/user/$b] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,228 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): handleAppendEntriesReply: follower follower-2 last log term 0 for index 0 conflicts with the leader's 1 - set the follower's next index to -1 12:45:27,228 AM [test-akka.actor.default-dispatcher-6] [INFO] EmptyLocalActorRef - akkaDeadLetter Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader562#-102391403] to Actor[akka://test/user/$c] was not delivered. [10] dead letters encountered, no more dead letters will be logged in next [5.000 min]. If this is not an expected behavior then Actor[akka://test/user/$c] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. 12:45:27,228 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Checking sendAppendEntries for follower follower-2: active: true, followerNextIndex: -1, leaderLastIndex: 1, leaderSnapShotIndex: -1 [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-11] [akka://test/user/$a] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-6] [akka://test/user/$a] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,228 AM [main] [INFO] MockRaftActorContext - IsolatedLeader isolated-leader switching from IsolatedLeader to Leader [INFO] [akkaDeadLetter][08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-5] [akka://test/user/$c] Message [org.opendaylight.controller.cluster.raft.messages.AppendEntries] from Actor[akka://test/user/leader562#-102391403] to Actor[akka://test/user/$c] was not delivered. [10] dead letters encountered, no more dead letters will be logged in next [5.000 min]. If this is not an expected behavior then Actor[akka://test/user/$c] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-6] [akka://test/user/$b] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,228 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Election: Leader has following peers: [follower-4, follower-3, follower-2, follower-1] 12:45:27,228 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Checking sendAppendEntries for follower follower-4: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,228 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Checking sendAppendEntries for follower follower-3: active: false, followerNextIndex: 1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,228 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Checking sendAppendEntries for follower follower-2: active: true, followerNextIndex: -1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,228 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Checking sendAppendEntries for follower follower-1: active: true, followerNextIndex: -1, leaderLastIndex: 1, leaderSnapShotIndex: -1 [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-11] [akka://test/user/$d] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,228 AM [main] [DEBUG] DefaultConfigParamsImpl - No custom RaftPolicy specified. Using DefaultRaftPolicy 12:45:27,228 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader) :- Switching from behavior IsolatedLeader to Leader, election term: 1 [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-11] [akka://test/user/$c] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=0, prevLogTerm=1, leaderCommit=-1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=4, leaderRaftVersion=5, leaderAddress=null, entries=[]] [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-11] [akka://test/user/$b] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,228 AM [main] [INFO] MockRaftActorContext - isolated-leader (Leader): handleAppendEntriesReply: follower follower-3 last log term 0 for index 0 conflicts with the leader's 1 - set the follower's next index to -1 [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-11] [akka://test/user/$a] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,228 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (Leader): Checking sendAppendEntries for follower follower-3: active: true, followerNextIndex: -1, leaderLastIndex: 1, leaderSnapShotIndex: -1 12:45:27,228 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior561#-1581822193] [WARN] [08/02/2025 00:45:27.228] [test-akka.actor.default-dispatcher-11] [akka://test/user/$c] received dead letter from Actor[akka://test/user/leader562#-102391403]: AppendEntries [leaderId=isolated-leader, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]] 12:45:27,239 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader562#-102391403] 12:45:27,239 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender563#-1265816127] 12:45:27,241 AM [main] [INFO] IsolatedLeaderTest - Starting testLeaderSchedulesHeartbeatsEvenWhenNoFollowersRespondToInitialAppendEntries 12:45:27,242 AM [main] [DEBUG] MockRaftActorContext - leader567: Moving last applied index from -1 to 1 12:45:27,242 AM [main] [DEBUG] MockRaftActorContext - leader567 (IsolatedLeader): Election: Leader has following peers: [follower568, follower569] 12:45:27,242 AM [main] [DEBUG] MockRaftActorContext - leader567 (IsolatedLeader): Checking sendAppendEntries for follower follower568: active: false, followerNextIndex: 1, leaderLastIndex: 4, leaderSnapShotIndex: -1 12:45:27,242 AM [main] [DEBUG] MockRaftActorContext - leader567 (IsolatedLeader): Checking sendAppendEntries for follower follower569: active: false, followerNextIndex: 1, leaderLastIndex: 4, leaderSnapShotIndex: -1 12:45:28,242 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior564#151584529] 12:45:28,253 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader565#1502526138] 12:45:28,254 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender566#1764802483] 12:45:28,254 AM [main] [INFO] TestActorFactory - Killing actor TestActor[akka://test/user/leader567] 12:45:28,255 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/follower568#2136448290] 12:45:28,255 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/follower569#-1768667501] 12:45:28,257 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:28,258 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,258 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): In requestVote: RequestVote [term=1, candidateId=test, lastLogIndex=10000, lastLogTerm=999] - currentTerm: 1, votedFor: test, lastIndex: 1, lastTerm: 1 12:45:28,258 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): requestVote returning: RequestVoteReply [term=1, voteGranted=true] 12:45:28,258 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior570#584882157] 12:45:28,269 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader571#406137631] 12:45:28,269 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender572#28545849] 12:45:28,271 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:28,271 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,271 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): handleAppendEntries: AppendEntries [leaderId=leader-1, prevLogIndex=-1, prevLogTerm=-1, leaderCommit=2, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[SimpleReplicatedLogEntry [index=0, term=2, payload=zero]]] 12:45:28,271 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior573#2098689739] 12:45:28,282 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader574#-1078914703] 12:45:28,282 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender575#-607473725] 12:45:28,284 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:28,285 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,285 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): In requestVote: RequestVote [term=1, candidateId=test, lastLogIndex=1999, lastLogTerm=1] - currentTerm: 1, votedFor: test, lastIndex: 2000, lastTerm: 1 12:45:28,285 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): requestVote returning: RequestVoteReply [term=1, voteGranted=false] 12:45:28,285 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior576#-1561424940] 12:45:28,295 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader577#1715907187] 12:45:28,296 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender578#797796077] 12:45:28,298 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:28,298 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,298 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): Term 100 in "AppendEntries [leaderId=leader-1, prevLogIndex=0, prevLogTerm=0, leaderCommit=1, replicatedToAllIndex=-1, payloadVersion=0, recipientRaftVersion=5, leaderRaftVersion=5, leaderAddress=null, entries=[]]" message is greater than leader's term 1 - switching to Follower 12:45:28,298 AM [main] [DEBUG] DefaultConfigParamsImpl - No custom RaftPolicy specified. Using DefaultRaftPolicy 12:45:28,298 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader) :- Switching from behavior IsolatedLeader to Follower, election term: 100 12:45:28,298 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,298 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): Term 100 in "AppendEntriesReply [term=100, success=false, followerId=follower-1, logLastIndex=100, logLastTerm=100, forceInstallSnapshot=false, needsLeaderAddress=false, payloadVersion=0, raftVersion=5, recipientRaftVersion=5]" message is greater than leader's term 1 - switching to Follower 12:45:28,298 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader) :- Switching from behavior IsolatedLeader to Follower, election term: 100 12:45:28,298 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,298 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Found higher term in RequestVote rpc, verifying whether it's safe to update term. 12:45:28,298 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Cluster state: [] 12:45:28,298 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Candidate in requestVote:RequestVote [term=100, candidateId=candidate-1, lastLogIndex=10, lastLogTerm=100] with higher term appears reachable, updating term. 12:45:28,298 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): Term 100 in "RequestVote [term=100, candidateId=candidate-1, lastLogIndex=10, lastLogTerm=100]" message is greater than leader's term 1 - switching to Follower 12:45:28,298 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader) :- Switching from behavior IsolatedLeader to Follower, election term: 100 12:45:28,298 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,298 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): Term 100 in "RequestVoteReply [term=100, voteGranted=false]" message is greater than leader's term 1 - switching to Follower 12:45:28,299 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader) :- Switching from behavior IsolatedLeader to Follower, election term: 100 12:45:28,299 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior579#-86076489] 12:45:28,309 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader580#296370101] 12:45:28,309 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender581#-123623559] 12:45:28,311 AM [main] [DEBUG] MockRaftActorContext - test: Moving last applied index from -1 to 1 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test: Moving last applied index from 1 to 0 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test: Moving last applied index from 0 to 0 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test: Moving last applied index from 0 to 1 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test: fakeSnapshot purging log to 0 for term 1 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test: Moving last applied index from 1 to 2 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test: fakeSnapshot purging log to 1 for term 1 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test: Moving last applied index from 2 to 2 12:45:28,312 AM [main] [DEBUG] MockRaftActorContext - test: fakeSnapshot purging log to 1 for term 1 12:45:28,312 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior582#1613719671] 12:45:28,322 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader583#751330271] 12:45:28,323 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender584#-1060068438] 12:45:28,328 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:28,328 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,328 AM [main] [INFO] MockRaftActorContext - isolated-leader (IsolatedLeader): Cannot append entries because sender's term 100 is less than 1000 12:45:28,328 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior585#1175991148] 12:45:28,329 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader586#-1907620859] 12:45:28,329 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender587#-42646461] 12:45:28,331 AM [main] [DEBUG] MockRaftActorContext - isolated-leader: Moving last applied index from -1 to 1 12:45:28,331 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): Election: Leader has following peers: [] 12:45:28,331 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): In requestVote: RequestVote [term=999, candidateId=test, lastLogIndex=10000, lastLogTerm=999] - currentTerm: 1000, votedFor: null, lastIndex: 1, lastTerm: 1 12:45:28,331 AM [main] [DEBUG] MockRaftActorContext - isolated-leader (IsolatedLeader): requestVote returning: RequestVoteReply [term=1000, voteGranted=false] 12:45:28,331 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/behavior588#162577549] 12:45:28,332 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/leader589#311022814] 12:45:28,332 AM [main] [INFO] TestActorFactory - Killing actor Actor[akka://test/user/sender590#1882200142] [INFO] [08/02/2025 00:45:28.333] [main] [CoordinatedShutdown(akka://test)] Running CoordinatedShutdown with reason [ActorSystemTerminateReason] 12:45:28,333 AM [test-akka.actor.default-dispatcher-11] [INFO] CoordinatedShutdown - Running CoordinatedShutdown with reason [ActorSystemTerminateReason] 12:45:28,335 AM [test-akka.actor.default-dispatcher-6] [INFO] Cluster - Cluster Node [akka://test@10.30.170.253:25520] - Exiting completed 12:45:28,335 AM [test-akka.actor.default-dispatcher-6] [INFO] Cluster - Cluster Node [akka://test@10.30.170.253:25520] - Shutting down... 12:45:28,335 AM [test-akka.actor.default-dispatcher-6] [INFO] Cluster - Cluster Node [akka://test@10.30.170.253:25520] - Successfully shut down [WARN] [08/02/2025 00:45:28.334] [test-akka.actor.default-dispatcher-11] [akka://test/system/cluster/core/daemon] unhandled message from Actor[akka://test/deadLetters]: Leave(akka://test@10.30.170.253:25520) [INFO] [08/02/2025 00:45:28.334] [test-akka.actor.internal-dispatcher-8] [Cluster(akka://test)] Cluster Node [akka://test@10.30.170.253:25520] - Exiting completed [INFO] [08/02/2025 00:45:28.334] [test-akka.actor.internal-dispatcher-8] [Cluster(akka://test)] Cluster Node [akka://test@10.30.170.253:25520] - Shutting down... [INFO] [08/02/2025 00:45:28.334] [test-akka.actor.internal-dispatcher-8] [Cluster(akka://test)] Cluster Node [akka://test@10.30.170.253:25520] - Successfully shut down 12:45:28,336 AM [test-akka.actor.default-dispatcher-6] [INFO] RemoteActorRefProvider$RemotingTerminator - Shutting down remote daemon. [INFO] [08/02/2025 00:45:28.336] [test-akka.remote.default-remote-dispatcher-7] [akka://test@10.30.170.253:25520/system/remoting-terminator] Shutting down remote daemon. 12:45:28,336 AM [test-akka.actor.default-dispatcher-6] [INFO] RemoteActorRefProvider$RemotingTerminator - Remote daemon shut down; proceeding with flushing remote transports. [INFO] [08/02/2025 00:45:28.336] [test-akka.remote.default-remote-dispatcher-7] [akka://test@10.30.170.253:25520/system/remoting-terminator] Remote daemon shut down; proceeding with flushing remote transports. 12:45:28,338 AM [test-akka.actor.default-dispatcher-6] [INFO] RemoteActorRefProvider$RemotingTerminator - Remoting shut down.