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https://issues.apache.org/jira/browse/CASSANDRA-14375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16484284#comment-16484284
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Vineet Ghatge commented on CASSANDRA-14375:
-------------------------------------------
Any one able to reproduce the issue. Using the following option -
{{JVM_OPTS="$JVM_OPTS -Dcassandra.load_ring_state=false"}} on cluster node for
very unreliable network avoids this problem.
> Digest mismatch Exception when sending raw hints in cluster
> -----------------------------------------------------------
>
> Key: CASSANDRA-14375
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14375
> Project: Cassandra
> Issue Type: Bug
> Components: Hints
> Environment: CentOS 7.3
> Reporter: Vineet Ghatge
> Priority: Major
>
> We have 14 nodes cluster where we seen hints file getting corrupted and
> resulting in the following error
> {noformat}
> ERROR [HintsDispatcher:1] 2018-04-06 16:26:44,423 CassandraDaemon.java:228 -
> Exception in thread Thread[HintsDispatcher:1,1,main]
> org.apache.cassandra.io.FSReadError: java.io.IOException: Digest mismatch
> exception
> at
> org.apache.cassandra.hints.HintsReader$BuffersIterator.computeNext(HintsReader.java:298)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsReader$BuffersIterator.computeNext(HintsReader.java:263)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsDispatcher.sendHints(HintsDispatcher.java:169)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsDispatcher.sendHintsAndAwait(HintsDispatcher.java:128)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsDispatcher.dispatch(HintsDispatcher.java:113)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsDispatcher.dispatch(HintsDispatcher.java:94)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.deliver(HintsDispatchExecutor.java:278)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.dispatch(HintsDispatchExecutor.java:260)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.dispatch(HintsDispatchExecutor.java:238)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.run(HintsDispatchExecutor.java:217)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> ~[na:1.8.0_141]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_141]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> ~[na:1.8.0_141]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> [na:1.8.0_141]
> at
> org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:81)
> [apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_141]
> Caused by: java.io.IOException: Digest mismatch exception
> at
> org.apache.cassandra.hints.HintsReader$BuffersIterator.computeNextInternal(HintsReader.java:315)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> at
> org.apache.cassandra.hints.HintsReader$BuffersIterator.computeNext(HintsReader.java:289)
> ~[apache-cassandra-3.11.1.jar:3.11.1-SNAPSHOT]
> ... 16 common frames omitted
> {noformat}
> Notes on cluster and investigation done so far
> 1. Cassandra used here is built locally from 3.11.1 branch along with
> following patch from issue: CASSANDRA-14080
>
> [https://github.com/apache/cassandra/commit/68079e4b2ed4e58dbede70af45414b3d4214e195]
> 2. The bootstrap of 14 nodes happens in the following way:
> - Out of 14 nodes only 3 nodes are picked as seed nodes.
> - Only 1 out 3 seed nodes is started and schema is created if it was not
> created previously.
> - Post this, rest of nodes are bootstrapped.
> - In failure scenario, only 5 out of 14 succesfully formed the cassandra
> cluster. The failed nodes include two seed nodes.
> 3. We confirmed the following patch from issue: CASSANDRA-13696 has been
> applied. From confirmed from Jay Zhuang that this is different issue from
> what was previously fixed.
> "this should be a different issue, as HintsDispatcher.java:128 sends hints
> with \{{buffer}}s, this patch is only to fix the digest mismatch for
> HintsDispatcher.java:129, which sends hints one by one."
> 4. Application uses java driver with quoram setting for cassandra
> 5. We saw this issue on 7 node cluster too (different from 14 node cluster)
> 6. We are able to workaround by running nodetool truncatehints on failed
> nodes and restarting cassandra.
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