it looks like  same node getting down every times. I have did total 4-5 times but NN1 is going down. I have compared  JVM heap mem size between NN1 and NN2 but both are same, (getting config from Ambari correctly) not sure what to try next??? ... View more

Looks like memory upgrade from 128 GB to 256 GB and gave 192 GB to JVM heap would not be able to resolve my issue. same NN stopped 2 times and I started one more time . It got same Journal "FATAL namenode.FSEditLog " error. Lets see if it would happen 3rd time in same node or other. ... View more

Below are some info from cluster. So I need to increase MEM or delete some data from HDFS. I am not sure if I can delete some data, since NN doesn't response most of the time to the cli commands. Anyway will try for both options. I will let you know the results.  Thanks for reply  @rki_ and @Kartik_Agarwal .  248,193,147 files and directories, 143,527,877 blocks (7,155 replicated blocks, 143,520,722 erasure coded block groups) = 391,721,024 total filesystem object(s). Heap Memory used 86.63 GB of 94.8 GB Heap Memory. Max Heap Memory is 94.8 GB.   ... View more

Here is the Name Node JVM settings; based on  best practice on this page  /usr/jdk64/jdk1.8.0_112/bin/java -Dproc_namenode -Dhdp.version=3.1.0.0-78 -Djava.net.preferIPv4Stack=true -Dhdp.version=3.1.0.0-78 -Dhdfs.audit.logger=INFO,NullAppender -server -XX:ParallelGCThreads=8 -XX:+UseConcMarkSweepGC -XX:ErrorFile=/var/log/hadoop/hdfs/hs_err_pid%p.log -XX:NewSize=12288m -XX:MaxNewSize=12288m ## ---- This is missing on my config -XX:PermSize=12288m -XX:MaxPermSize=24576m ## ----- -Xloggc:/var/log/hadoop/hdfs/gc.log-202212222050 -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -XX:CMSInitiatingOccupancyFraction=70 -XX:+UseCMSInitiatingOccupancyOnly -Xms98304m -Xmx98304m -Dhadoop.security.logger=INFO,DRFAS -Dhdfs.audit.logger=INFO,DRFAAUDIT -XX:OnOutOfMemoryError="/usr/hdp/current/hadoop-hdfs-namenode/bin/kill-name-node" -Dorg.mortbay.jetty.Request.maxFormContentSize=-1 -Dyarn.log.dir=/var/log/hadoop/hdfs -Dyarn.log.file=hadoop-hdfs-namenode-lvs-hdadm-103.domain.com.log -Dyarn.home.dir=/usr/hdp/3.1.0.0-78/hadoop-yarn -Dyarn.root.logger=INFO,console -Djava.library.path=:/usr/hdp/3.1.0.0-78/hadoop/lib/native/Linux-amd64-64:/usr/hdp/3.1.0.0-78/hadoop/lib/native/Linux-amd64-64:/usr/hdp/3.1.0.0-78/hadoop/lib/native -Dhadoop.log.dir=/var/log/hadoop/hdfs -Dhadoop.log.file=hadoop-hdfs-namenode-lvs-hdadm-103.domain.com.log -Dhadoop.home.dir=/usr/hdp/3.1.0.0-78/hadoop -Dhadoop.id.str=hdfs -Dhadoop.root.logger=INFO,RFA -Dhadoop.policy.file=hadoop-policy.xml org.apache.hadoop.hdfs.server.namenode.NameNode ... View more

A few findings; After changed dfs.datanode.max.transfer.threads  from 4K to  16K   , I did restart the all required services and than one day later I started second NN2,  but once NN2 got started NN1 was got shutdown (see logs).  Same issue happened again. Get client.QuorumJournalManager exception and shutdown NN.   I have noticed, namenode process use 100% CPU load and most of the time it cannot response hdfs cli commands. I am wondering is there any way to split namenode process a few other thread?  ### NN2 lvs-hdadm-103 started on 12/27 at 11:09 am 2022-12-26 17:06:02,973 INFO namenode.NameNode ( LogAdapter . java : info ( 51 )) - SHUTDOWN_MSG: SHUTDOWN_MSG: Shutting down NameNode at lvs-hdadm-103.domain.com/P.Q.161.13 2022-12-27 11:09:41,059 INFO namenode.NameNode ( LogAdapter . java : info ( 51 )) - STARTUP_MSG: STARTUP_MSG: Starting NameNode STARTUP_MSG: host = lvs-hdadm-103.domain.com/P.Q.161.13 STARTUP_MSG: args = [] STARTUP_MSG: version = 3.1.1.3.1.0.0-78 And these are the NN1 logs;   [root@lvs-hdadm-102 ~]# grep -Ei "SHUTDOWN_MSG|WARN client|FATAL" /var/log/hadoop/hdfs/hadoop-hdfs-namenode-lvs-hdadm-102.domain.com.log 2022-12-27 11:24:16,681 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(417)) - Took 4836ms to send a batch of 1 edits (226 bytes) to remote journal P.Q.161.14:8485 2022-12-27 11:24:16,889 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(417)) - Took 5045ms to send a batch of 1 edits (226 bytes) to remote journal P.Q.161.12:8485 2022-12-27 11:24:16,964 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(417)) - Took 5119ms to send a batch of 1 edits (226 bytes) to remote journal P.Q.161.13:8485 2022-12-27 12:56:45,318 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(399)) - Remote journal P.Q.161.13:8485 failed to write txns 2206645777-2206645778. Will try to write to this JN again after the next log roll. 2022-12-27 12:56:45,318 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(399)) - Remote journal P.Q.161.12:8485 failed to write txns 2206645777-2206645778. Will try to write to this JN again after the next log roll. 2022-12-27 12:56:45,318 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(399)) - Remote journal P.Q.161.14:8485 failed to write txns 2206645777-2206645778. Will try to write to this JN again after the next log roll. 2022-12-27 12:56:45,323 FATAL namenode.FSEditLog (JournalSet.java:mapJournalsAndReportErrors(390)) - Error: flush failed for required journal (JournalAndStream(mgr=QJM to [P.Q.161.12:8485, P.Q.161.13:8485, P.Q.161.14:8485], stream=QuorumOutputStream starting at txid 2206626947)) 2022-12-27 12:56:45,325 WARN client.QuorumJournalManager (QuorumOutputStream.java:abort(74)) - Aborting QuorumOutputStream starting at txid 2206626947 2022-12-27 12:56:45,340 INFO namenode.NameNode (LogAdapter.java:info(51)) - SHUTDOWN_MSG: SHUTDOWN_MSG: Shutting down NameNode at lvs-hdadm-102.domain.com/P.Q.161.12 [root@lvs-hdadm-102 ~]# grep -Ei "SHUTDOWN_MSG|WARN|FATAL" /var/log/hadoop/hdfs/hadoop-hdfs-namenode-lvs-hdadm-102.domain.com.log 2022-12-27 09:50:37,381 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d5d2 is not valid for DN d233a1ba-de3e-448d-8151-daf51eb7f287, because the DN is not in the pending set. ## above message got x 88 times 2022-12-27 09:50:37,447 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d5ec is not valid for DN 025adeaa-bce6-4a61-be73-8c66707084ba, because the DN is not in the pending set. 2022-12-27 09:50:39,308 WARN hdfs.StateChange (FSNamesystem.java:internalReleaseLease(3441)) - DIR* NameSystem.internalReleaseLease: File /ingest/splunk/hdr/app_logs_archive/archive_v3/app_logs/4D69DE10-C9C0-4A5C-BB68-039B1B1F7FCC/1614643200_1603584000/1614643200_1603584000/db_1609183032_1609057428_9023_4D69DE10-C9C0-4A5C-BB68-039B1B1F7FCC/journal.gz has not been closed. Lease recovery is in progress. RecoveryId = 230287624 for block blk_-9223372035367162256_128679723 2022-12-27 09:50:41,098 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 4 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 09:50:41,357 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 6 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 09:50:41,411 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 5 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 10:05:13,822 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 867425ms 2022-12-27 10:05:36,935 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 21110ms 2022-12-27 10:07:37,448 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d5ec is not valid for DN 025adeaa-bce6-4a61-be73-8c66707084ba, because the DN is not in the pending set. 2022-12-27 10:07:37,897 WARN hdfs.StateChange (FSNamesystem.java:internalReleaseLease(3441)) - DIR* NameSystem.internalReleaseLease: File /ingest/splunk/hdr/app_logs_archive/archive_v3/app_logs/2F4DDF15-6E57-4584-AB79-F34C6479E3F8/1609113600_1607731200/1608249600_1608076800/db_1608204596_1608125285_2372_2F4DDF15-6E57-4584-AB79-F34C6479E3F8/journal.gz has not been closed. Lease recovery is in progress. RecoveryId = 230287627 for block blk_-9223372035389569520_127278003 2022-12-27 10:07:38,298 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 6 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 10:07:38,311 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 5 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 10:07:38,328 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 6 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 10:07:38,338 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 5 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 10:07:38,344 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 7 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 10:07:38,353 WARN blockmanagement.BlockPlacementPolicy (BlockPlacementPolicyDefault.java:chooseTarget(432)) - Failed to place enough replicas, still in need of 5 to reach 9 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology 2022-12-27 10:21:11,867 WARN blockmanagement.HeartbeatManager (HeartbeatManager.java:run(462)) - Skipping next heartbeat scan due to excessive pause 2022-12-27 10:21:12,090 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 813036ms 2022-12-27 10:21:37,394 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 23302ms 2022-12-27 10:36:35,325 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 859903ms 2022-12-27 10:37:00,238 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 22905ms 2022-12-27 10:52:33,328 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 893538ms 2022-12-27 10:53:00,215 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 24865ms 2022-12-27 11:07:58,912 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 865649ms 2022-12-27 11:08:24,345 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 23432ms ## from this point NN2 got started up at 11:09 2022-12-27 11:23:43,406 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 890551ms 2022-12-27 11:24:10,580 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 25173ms 2022-12-27 11:24:11,813 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:requestLease(230)) - DN 165757d4-6293-4808-a136-24d3a4d3c676 (P.Q.161.62:50010) requested a lease even though it wasn't yet registered. Registering now. 2022-12-27 11:24:11,886 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d5d5 is not valid for DN b581acf8-f4d3-4c9b-9ef4-43faace4e7be, because the DN is not in the pending set. ## above message got x 116 times 2022-12-27 11:24:11,958 WARN hdfs.StateChange (FSDirRenameOp.java:validateRenameSource(560)) - DIR* FSDirectory.unprotectedRenameTo: rename source /ingest/splunk/hdr/network_archive/tmp/com.splunk.roll.Transactor-e4ff7a87-8b84-40c1-a1a2-d361eccb830f.tmp is not found. 2022-12-27 11:24:12,020 WARN hdfs.StateChange (FSNamesystem.java:internalReleaseLease(3441)) - DIR* NameSystem.internalReleaseLease: File /ingest/splunk/hdr/os_archive/archive_v3/os/E6527EDD-8E52-4B86-9ABD-D205AD24E2E8/1606348800_1603584000/1606348800_1603584000/db_1605485341_1604591209_1936_E6527EDD-8E52-4B86-9ABD-D205AD24E2E8/journal.gz has not been closed. Lease recovery is in progress. RecoveryId = 230287636 for block blk_-9223372035573309296_115793229 2022-12-27 11:24:16,681 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(417)) - Took 4836ms to send a batch of 1 edits (226 bytes) to remote journal P.Q.161.14:8485 2022-12-27 11:24:16,889 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(417)) - Took 5045ms to send a batch of 1 edits (226 bytes) to remote journal P.Q.161.12:8485 2022-12-27 11:24:16,964 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(417)) - Took 5119ms to send a batch of 1 edits (226 bytes) to remote journal P.Q.161.13:8485 2022-12-27 11:39:36,321 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 842594ms 2022-12-27 11:40:03,309 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 24986ms 2022-12-27 11:40:34,887 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d607 is not valid for DN b8a82844-d2eb-4654-b365-a003212fc883, because the DN is not in the pending set. 2022-12-27 11:40:34,961 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d5ec is not valid for DN 025adeaa-bce6-4a61-be73-8c66707084ba, because the DN is not in the pending set. 2022-12-27 11:40:34,965 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(317)) - BR lease 0x9c43be53a3d0d608 is not valid for DN 165757d4-6293-4808-a136-24d3a4d3c676, because the lease has expired. 2022-12-27 11:40:34,965 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d607 is not valid for DN b8a82844-d2eb-4654-b365-a003212fc883, because the DN is not in the pending set. 2022-12-27 11:40:34,965 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d5fc is not valid for DN 4638701d-0001-4086-9de6-dfc9fe1c67d7, because the DN is not in the pending set. 2022-12-27 11:40:34,966 WARN blockmanagement.BlockReportLeaseManager (BlockReportLeaseManager.java:checkLease(311)) - BR lease 0x9c43be53a3d0d607 is not valid for DN b8a82844-d2eb-4654-b365-a003212fc883, because the DN is not in the pending set. 2022-12-27 11:40:37,235 WARN hdfs.StateChange (FSNamesystem.java:internalReleaseLease(3441)) - DIR* NameSystem.internalReleaseLease: File /ingest/splunk/hdr/main_archive/archive_v3/main/441D58DC-A942-428A-958A-4D3DFC583008/1600819200_1599436800/1600819200_1600128000/db_1600627689_1600336233_1710_441D58DC-A942-428A-958A-4D3DFC583008/journal.gz has not been closed. Lease recovery is in progress. RecoveryId = 230287641 for block blk_-9223372035529627248_118523521 2022-12-27 11:40:38,717 WARN blockmanagement.HeartbeatManager (HeartbeatManager.java:run(462)) - Skipping next heartbeat scan due to excessive pause 2022-12-27 11:55:45,850 WARN blockmanagement.HeartbeatManager (HeartbeatManager.java:run(462)) - Skipping next heartbeat scan due to excessive pause 2022-12-27 11:55:46,047 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 881892ms 2022-12-27 11:56:10,972 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 22918ms 2022-12-27 12:11:18,074 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 871503ms 2022-12-27 12:11:43,010 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 22935ms 2022-12-27 12:26:24,884 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 854865ms 2022-12-27 12:26:49,182 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 22296ms 2022-12-27 12:41:11,944 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 836753ms 2022-12-27 12:41:36,208 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 22261ms 2022-12-27 12:56:13,594 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 854379ms 2022-12-27 12:56:37,767 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 22172ms 2022-12-27 12:56:45,318 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(399)) - Remote journal P.Q.161.13:8485 failed to write txns 2206645777-2206645778. Will try to write to this JN again after the next log roll. 2022-12-27 12:56:45,318 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(399)) - Remote journal P.Q.161.12:8485 failed to write txns 2206645777-2206645778. Will try to write to this JN again after the next log roll. 2022-12-27 12:56:45,318 WARN client.QuorumJournalManager (IPCLoggerChannel.java:call(399)) - Remote journal P.Q.161.14:8485 failed to write txns 2206645777-2206645778. Will try to write to this JN again after the next log roll. 2022-12-27 12:56:45,323 FATAL namenode.FSEditLog (JournalSet.java:mapJournalsAndReportErrors(390)) - Error: flush failed for required journal (JournalAndStream(mgr=QJM to [P.Q.161.12:8485, P.Q.161.13:8485, P.Q.161.14:8485], stream=QuorumOutputStream starting at txid 2206626947)) 2022-12-27 12:56:45,325 WARN client.QuorumJournalManager (QuorumOutputStream.java:abort(74)) - Aborting QuorumOutputStream starting at txid 2206626947 2022-12-27 12:56:45,340 INFO namenode.NameNode (LogAdapter.java:info(51)) - SHUTDOWN_MSG: SHUTDOWN_MSG: Shutting down NameNode at lvs-hdadm-102.domain.com/P.Q.161.12 [root@lvs-hdadm-102 ~]# ... View more

it is happening on both NN. in this last time, it happened on standby (NN1). In the NN logs, I have seen JVM Pause warning message every 15 minutes frequency about ~80 sec pause. the other main issue NN doesn't response to hdfs dfs cli commands or take too long to response.   ############ P.Q.161.12 : lvs-hdadm-102 (NN1, JN1) NameNode Logs 2022-12-24 18:58:16,804 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 28062ms No GCs detected 2022-12-24 19:12:37,133 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 854108ms GC pool 'ConcurrentMarkSweep' had collection(s): count=1 time=854065ms 2022-12-24 19:13:06,386 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 27250ms No GCs detected 2022-12-24 19:27:28,115 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 828717ms GC pool 'ConcurrentMarkSweep' had collection(s): count=1 time=829081ms 2022-12-24 19:27:57,400 WARN util.JvmPauseMonitor (JvmPauseMonitor.java:run(201)) - Detected pause in JVM or host machine (eg GC): pause of approximately 26782ms No GCs detected ############ 2022-12-24 19:28:12,812 FATAL namenode.FSEditLog (JournalSet.java:mapJournalsAndReportErrors(390)) - Error: starting log segment 2205245876 failed for required journal (JournalAndStream(mgr=QJM to [P.Q.161.12:8485, P.Q.161.13:8485, P.Q.161.14:8485], stream=null)) org.apache.hadoop.hdfs.qjournal.client.QuorumException: Got too many exceptions to achieve quorum size 2/3. 3 exceptions thrown: P.Q.161.12:8485: IPC's epoch 205 is less than the last promised epoch 206 ; journal id: GISHortonDR P.Q.161.13:8485: IPC's epoch 205 is less than the last promised epoch 206 ; journal id: GISHortonDR P.Q.161.14:8485: IPC's epoch 205 is less than the last promised epoch 206 ; journal id: GISHortonDR 2022-12-24 19:28:12,841 INFO util.ExitUtil (ExitUtil.java:terminate(210)) - Exiting with status 1: Error: starting log segment 2205245876 failed for required journal (JournalAndStream(mgr=QJM to [P.Q.161.12:8485, P.Q.161.13:8485, P.Q.161.14:8485], stream=null)) 2022-12-24 19:28:12,845 INFO namenode.NameNode (LogAdapter.java:info(51)) - SHUTDOWN_MSG: Dont see any error on network stats; [root@lvs-hdadm-102 ~]# ifconfig -a bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 9000 inet 10.229.161.12 netmask 255.255.254.0 broadcast 10.229.161.255 ether 5c:b9:01:89:1b:5c txqueuelen 1000 (Ethernet) RX packets 1777351730 bytes 2383624637851 (2.1 TiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2093695795 bytes 1376445489747 (1.2 TiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0   [root@lvs-hdadm-102 ~]# netstat -i Kernel Interface table Iface MTU RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg bond0 9000 1777439746 0 0 0 2093764662 0 0 0 BMmRU eno1 1500 0 0 0 0 0 0 0 0 BMU eno2 1500 0 0 0 0 0 0 0 0 BMU eno3 1500 0 0 0 0 0 0 0 0 BMU eno4 1500 0 0 0 0 0 0 0 0 BMU eno49 9000 1717336519 0 0 0 2093764662 0 0 0 BMsRU eno50 9000 60103257 0 0 0 0 0 0 0 BMsRU ens1f0 1500 0 0 0 0 0 0 0 0 BMU ens1f1 1500 0 0 0 0 0 0 0 0 BMU lo 65536 41174312 0 0 0 41174312 0 0 0 LRU And both NN are working with too high CPU utilization , mostly it has 100 % cpu utilization. ## NN2: [root@lvs-hdadm-103 ~]# top -p 37939 top - 10:35:17 up 33 days, 21:59, 1 user, load average: 1.33, 1.31, 1.41 Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie %Cpu(s): 1.8 us, 0.8 sy, 0.0 ni, 97.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem : 13173120+total, 5608700 free, 11516615+used, 10956348 buff/cache KiB Swap: 0 total, 0 free, 0 used. 13160080 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 37939 hdfs 20 0 100.0g 98.2g 15820 S 100.3 78.2 6848:11 java Mem config: -Xms98304m -Xmx98304m Total Mem on each NN : 128 GB   I have changed  dfs.datanode.max.transfer.threads from 4K to 16K and did restart all required services, NN, etc. take some times. Will let know if same issue happens again. ... View more

I have the same problem, but in my case JVM pause detections are happening every 15 mins and detecting between 28337ms, .. 853466ms pauses. ... View more