[ 
https://issues.apache.org/jira/browse/CASSANDRA-14375?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Jay Zhuang updated CASSANDRA-14375:
-----------------------------------
    Description: 
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.

  was:
We have 14 nodes cluster where we seen hints file getting corrupted and 
resulting in the following error

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.


> 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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