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Date: Mon, 17 Jul 2017 20:49:00 +0000 (UTC)
From: "Jeff Jirsa (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.13087482.1500272291000.267094.1500324540142@Atlassian.JIRA>
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Subject: [jira] [Commented] (CASSANDRA-13696) Digest mismatch Exception if
 hints file has UnknownColumnFamily
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archived-at: Mon, 17 Jul 2017 20:49:05 -0000


    [ https://issues.apache.org/jira/browse/CASSANDRA-13696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16090530#comment-16090530 ] 

Jeff Jirsa commented on CASSANDRA-13696:
----------------------------------------

Looks pretty serious, I'll try to get to it soon. Short term, your trunk patch doesn't actually compile ( {{CFMetaData}} is gone in trunk), can you fix that and  push that branch? 

> Digest mismatch Exception if hints file has UnknownColumnFamily
> ---------------------------------------------------------------
>
>                 Key: CASSANDRA-13696
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13696
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Jay Zhuang
>            Assignee: Jay Zhuang
>            Priority: Critical
>
> {noformat}
> WARN  [HintsDispatcher:2] 2017-07-16 22:00:32,579 HintsReader.java:235 - Failed to read a hint for /127.0.0.2: a2b7daf1-a6a4-4dfc-89de-32d12d2d48b0 - table with id 3882bbb0-6a71-11e7-9bca-2759083e3964 is unknown in file a2b7daf1-a6a4-4dfc-89de-32d12d2d48b0-1500242103097-1.hints
> ERROR [HintsDispatcher:2] 2017-07-16 22:00:32,580 HintsDispatchExecutor.java:234 - Failed to dispatch hints file a2b7daf1-a6a4-4dfc-89de-32d12d2d48b0-1500242103097-1.hints: file is corrupted ({})
> org.apache.cassandra.io.FSReadError: java.io.IOException: Digest mismatch exception
>     at org.apache.cassandra.hints.HintsReader$HintsIterator.computeNext(HintsReader.java:199) ~[main/:na]
>     at org.apache.cassandra.hints.HintsReader$HintsIterator.computeNext(HintsReader.java:164) ~[main/:na]
>     at org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47) ~[main/:na]
>     at org.apache.cassandra.hints.HintsDispatcher.sendHints(HintsDispatcher.java:157) ~[main/:na]
>     at org.apache.cassandra.hints.HintsDispatcher.sendHintsAndAwait(HintsDispatcher.java:139) ~[main/:na]
>     at org.apache.cassandra.hints.HintsDispatcher.dispatch(HintsDispatcher.java:123) ~[main/:na]
>     at org.apache.cassandra.hints.HintsDispatcher.dispatch(HintsDispatcher.java:95) ~[main/:na]
>     at org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.deliver(HintsDispatchExecutor.java:268) [main/:na]
>     at org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.dispatch(HintsDispatchExecutor.java:251) [main/:na]
>     at org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.dispatch(HintsDispatchExecutor.java:229) [main/:na]
>     at org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.run(HintsDispatchExecutor.java:208) [main/:na]
>     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_111]
>     at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_111]
>     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_111]
>     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_111]
>     at org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:79) [main/:na]
>     at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_111]
> Caused by: java.io.IOException: Digest mismatch exception
>     at org.apache.cassandra.hints.HintsReader$HintsIterator.computeNextInternal(HintsReader.java:216) ~[main/:na]
>     at org.apache.cassandra.hints.HintsReader$HintsIterator.computeNext(HintsReader.java:190) ~[main/:na]
>     ... 16 common frames omitted
> {noformat}
> It causes multiple cassandra nodes stop [by default|https://github.com/apache/cassandra/blob/cassandra-3.0/conf/cassandra.yaml#L188].
> Here is the reproduce steps on a 3 nodes cluster, RF=3:
> 1. stop node1
> 2. send some data with quorum (or one), it will generate hints file on node2/node3
> 3. drop the table
> 4. start node1
> node2/node3 will report "corrupted hints file" and stop. The impact is very bad for a large cluster, when it happens, almost all the nodes are down at the same time and we have to remove all the hints files (which contain the dropped table) to bring the node back.


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