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From "Nate McCall (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-12728) Handling partially written hint files
Date Thu, 27 Oct 2016 06:11:58 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-12728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nate McCall updated CASSANDRA-12728:
------------------------------------
    Labels: lhf  (was: )

> Handling partially written hint files
> -------------------------------------
>
>                 Key: CASSANDRA-12728
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12728
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Sharvanath Pathak
>            Assignee: Aleksey Yeschenko
>              Labels: lhf
>         Attachments: CASSANDRA-12728.patch
>
>
> {noformat}
> ERROR [HintsDispatcher:1] 2016-09-28 17:44:43,397 HintsDispatchExecutor.java:225 - Failed
to dispatch hints file d5d7257c-9f81-49b2-8633-6f9bda6e3dea-1474892654160-1.hints: file is
corrupted ({})
> org.apache.cassandra.io.FSReadError: java.io.EOFException
>         at org.apache.cassandra.hints.HintsReader$BuffersIterator.computeNext(HintsReader.java:282)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsReader$BuffersIterator.computeNext(HintsReader.java:252)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsDispatcher.sendHints(HintsDispatcher.java:156)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsDispatcher.sendHintsAndAwait(HintsDispatcher.java:137)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsDispatcher.dispatch(HintsDispatcher.java:119)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsDispatcher.dispatch(HintsDispatcher.java:91)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.deliver(HintsDispatchExecutor.java:259)
[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.dispatch(HintsDispatchExecutor.java:242)
[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.dispatch(HintsDispatchExecutor.java:220)
[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.run(HintsDispatchExecutor.java:199)
[apache-cassandra-3.0.6.jar:3.0.6]
>         at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_77]
>         at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_77]
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[na:1.8.0_77]
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[na:1.8.0_77]
>         at java.lang.Thread.run(Thread.java:745) [na:1.8.0_77]
> Caused by: java.io.EOFException: null
>         at org.apache.cassandra.io.util.RebufferingInputStream.readFully(RebufferingInputStream.java:68)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.io.util.RebufferingInputStream.readFully(RebufferingInputStream.java:60)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.ChecksummedDataInput.readFully(ChecksummedDataInput.java:126)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.utils.ByteBufferUtil.read(ByteBufferUtil.java:402) ~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsReader$BuffersIterator.readBuffer(HintsReader.java:310)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsReader$BuffersIterator.computeNextInternal(HintsReader.java:301)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         at org.apache.cassandra.hints.HintsReader$BuffersIterator.computeNext(HintsReader.java:278)
~[apache-cassandra-3.0.6.jar:3.0.6]
>         ... 15 common frames omitted
> {noformat}
> We've found out that the hint file was truncated because there was a hard reboot around
the time of last write to the file. I think we basically need to handle partially written
hint files. Also, the CRC file does not exist in this case (probably because it crashed while
writing the hints file). May be ignoring and cleaning up such partially written hint files
can be a way to fix this?



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