I don’t think anyone can predict with certainty if instance won’t crash but there are good chances it will - unless you take remedial actions. If you are not doing subrange repair, a lot of merkle tree data can potentially be scanned/streamed taking toll on memory resources – that , taking account of all other running operations , easily bust available memory.
You can do few things like – as short term measure – increase allotted heap size along with running subrange repair with script<https://github.com/BrianGallew/cassandra_range_repair> or by using reaper tool. You may also want to check partition sizes of tables (nodetool tablestats) if they’re bloated. See if table scans are infested with lots of tombstones which in turn also tax on heap consumption. My $.002 cents for the moment. From: Martin Xue [mailto:martin...@gmail.com] Sent: Wednesday, July 31, 2019 5:05 PM To: user@cassandra.apache.org Subject: Re: Repair failed and crash the node, how to bring it back? Hi Alex, Thanks for your reply. The disk space was around 80%. The crash happened during repair, primary range full repair on 1TB keyspace. Would that crash again? Thanks Regards Martin On Thu., 1 Aug. 2019, 12:04 am Alexander Dejanovski, <a...@thelastpickle.com<mailto:a...@thelastpickle.com>> wrote: It looks like you have a corrupted hint file. Did the node run out of disk space while repair was running? You might want to move the hint files off their current directory and try to restart the node again. Since you'll have lost mutations then, you'll need... to run repair ¯\_(ツ)_/¯ ----------------- Alexander Dejanovski France @alexanderdeja Consultant Apache Cassandra Consulting http://www.thelastpickle.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.thelastpickle.com_&d=DwMFaQ&c=LFYZ-o9_HUMeMTSQicvjIg&r=FsmDztdsVuIKml8IDhdHdg&m=aqZZWkKEeWsVQ2PMJTVVVUalIrPHmEb-m_FKlC77K7E&s=xmeRHOldyQXvEdz1mzGbFU2MRD5a-dY5qjQeOkovzWM&e=> On Wed, Jul 31, 2019 at 3:51 PM Martin Xue <martin...@gmail.com<mailto:martin...@gmail.com>> wrote: Hi, I am running repair on production, started with one of 6 nodes in the cluster (3 nodes in each of two DC). Cassandra version 3.0.14. running: repair -pr --full keyspace on node 1, 1TB data, takes two days, and crash, error shows: 3202]] finished (progress: 3%) Exception occurred during clean-up. java.lang.reflect.UndeclaredThrowableException Cassandra has shutdown. error: [2019-07-31 20:19:20,797] JMX connection closed. You should check server log for repair status of keyspace keyspace_masked (Subsequent keyspaces are not going to be repaired). -- StackTrace -- java.io.IOException: [2019-07-31 20:19:20,797] JMX connection closed. You should check server log for repair status of keyspace keyspace_masked keyspaces are not going to be repaired). at org.apache.cassandra.tools.RepairRunner.handleConnectionFailed(RepairRunner.java:97) at org.apache.cassandra.tools.RepairRunner.handleConnectionClosed(RepairRunner.java:91) at org.apache.cassandra.utils.progress.jmx.JMXNotificationProgressListener.handleNotification(JMXNotificationProgressListener.java:90) at javax.management.NotificationBroadcasterSupport.handleNotification(NotificationBroadcasterSupport.java:275) at javax.management.NotificationBroadcasterSupport$SendNotifJob.run(NotificationBroadcasterSupport.java:352) at javax.management.NotificationBroadcasterSupport$1.execute(NotificationBroadcasterSupport.java:337) at javax.management.NotificationBroadcasterSupport.sendNotification(NotificationBroadcasterSupport.java:248) at javax.management.remote.rmi.RMIConnector.sendNotification(RMIConnector.java:441) at javax.management.remote.rmi.RMIConnector.close(RMIConnector.java:533) at javax.management.remote.rmi.RMIConnector.access$1300(RMIConnector.java:121) at javax.management.remote.rmi.RMIConnector$RMIClientCommunicatorAdmin.gotIOException(RMIConnector.java:1534) at javax.management.remote.rmi.RMIConnector$RMINotifClient.fetchNotifs(RMIConnector.java:1352) at com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.fetchOneNotif(ClientNotifForwarder.java:655) at com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.fetchNotifs(ClientNotifForwarder.java:607) at com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.doRun(ClientNotifForwarder.java:471) at com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.run(ClientNotifForwarder.java:452) at com.sun.jmx.remote.internal.ClientNotifForwarder$LinearExecutor$1.run(ClientNotifForwarder.java:108) system.log shows INFO [Service Thread] 2019-07-31 20:19:08,579 GCInspector.java:284 - G1 Young Generation GC in 2915ms. G1 Eden Space: 914358272 -> 0; G1 Old Gen: 19043999248 -> 20219035248; INFO [Service Thread] 2019-07-31 20:19:08,579 StatusLogger.java:52 - Pool Name Active Pending Completed Blocked All Time Blocked INFO [Service Thread] 2019-07-31 20:19:08,584 StatusLogger.java:56 - MutationStage 19 15 9578177305 0 0 INFO [Service Thread] 2019-07-31 20:19:08,585 StatusLogger.java:56 - ViewMutationStage 0 0 0 0 0 INFO [Service Thread] 2019-07-31 20:19:08,585 StatusLogger.java:56 - ReadStage 10 0 219357504 0 0 INFO [Service Thread] 2019-07-31 20:19:08,585 StatusLogger.java:56 - RequestResponseStage 1 0 625174550 0 0 INFO [Service Thread] 2019-07-31 20:19:08,585 StatusLogger.java:56 - ReadRepairStage 0 0 2544772 0 0 INFO [Service Thread] 2019-07-31 20:19:08,585 StatusLogger.java:56 - CounterMutationStage 0 0 0 0 0 INFO [Service Thread] 2019-07-31 20:19:08,585 StatusLogger.java:56 - MiscStage 0 0 0 0 0 INFO [Service Thread] 2019-07-31 20:19:08,586 StatusLogger.java:56 - CompactionExecutor 1 1 9515493 0 0 When I restart the cassandra, it still failed, now the error in system.log shows: INFO [main] 2019-07-31 21:35:02,044 StorageService.java:575 - Cassandra version: 3.0.14 INFO [main] 2019-07-31 21:35:02,044 StorageService.java:576 - Thrift API version: 20.1.0 INFO [main] 2019-07-31 21:35:02,044 StorageService.java:577 - CQL supported versions: 3.4.0 (default: 3.4.0) ERROR [main] 2019-07-31 21:35:02,075 CassandraDaemon.java:710 - Exception encountered during startup org.apache.cassandra.io.FSReadError: java.io.EOFException at org.apache.cassandra.hints.HintsDescriptor.readFromFile(HintsDescriptor.java:142) ~[apache-cassandra-3.0.14.jar:3.0.14] at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_171] at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[na:1.8.0_171] at java.util.Iterator.forEachRemaining(Iterator.java:116) ~[na:1.8.0_171] at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) ~[na:1.8.0_171] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_171] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_171] at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_171] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_171] at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_171] at org.apache.cassandra.hints.HintsCatalog.load(HintsCatalog.java:65) ~[apache-cassandra-3.0.14.jar:3.0.14] at org.apache.cassandra.hints.HintsService.<init>(HintsService.java:88) ~[apache-cassandra-3.0.14.jar:3.0.14] at org.apache.cassandra.hints.HintsService.<clinit>(HintsService.java:63) ~[apache-cassandra-3.0.14.jar:3.0.14] at org.apache.cassandra.service.StorageProxy.<clinit>(StorageProxy.java:121) ~[apache-cassandra-3.0.14.jar:3.0.14] at java.lang.Class.forName0(Native Method) ~[na:1.8.0_171] at java.lang.Class.forName(Class.java:264) ~[na:1.8.0_171] at org.apache.cassandra.service.StorageService.initServer(StorageService.java:585) ~[apache-cassandra-3.0.14.jar:3.0.14] at org.apache.cassandra.service.StorageService.initServer(StorageService.java:570) ~[apache-cassandra-3.0.14.jar:3.0.14] at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:346) [apache-cassandra-3.0.14.jar:3.0.14] at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:569) [apache-cassandra-3.0.14.jar:3.0.14] at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:697) [apache-cassandra-3.0.14.jar:3.0.14] Caused by: java.io.EOFException: null at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803) ~[na:1.8.0_171] at org.apache.cassandra.hints.HintsDescriptor.deserialize(HintsDescriptor.java:237) ~[apache-cassandra-3.0.14.jar:3.0.14] at org.apache.cassandra.hints.HintsDescriptor.readFromFile(HintsDescriptor.java:138) ~[apache-cassandra-3.0.14.jar:3.0.14] ... 20 common frames omitted Can anyone help how to bring back the node again? Also there are (anti-compaction after repair) running on other nodes, shall I stopped them as well, if so how to do it (nodetool stop compaction?)? Any suggestions will be much appreciated. Thanks Regards Martin
