Vineet Ghatge created CASSANDRA-14375:
-----------------------------------------
Summary: 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
We have 14 nodes cluster where we seen hints file getting corrupted and
resulting in the following error
[04/06/18 12:21 PM] Kotkar, Shantanu: 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
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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