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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1653) Unable to merge during RandomWalk
Date Sat, 07 Nov 2015 18:46:11 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14995347#comment-14995347
] 

Josh Elser commented on ACCUMULO-1653:
--------------------------------------

Actually, re-reading through the linked issues, there was no code change for a defect. The
only thing added were tests. It's possible there's another issue that happened to fix a bug,
but I'm not sure. We're happy to help you on the mailing lists with Apache Accumulo defects,
but vendor specific issues are better served on that vendor's support channels.

> Unable to merge during RandomWalk
> ---------------------------------
>
>                 Key: ACCUMULO-1653
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1653
>             Project: Accumulo
>          Issue Type: Bug
>            Reporter: Sean Hickey
>
> I was running RandomWalk and ran into an issue where one of my walkers got stuck doing
a merge (on table id=20). The only related error that showed up was that a file in HDFS couldn't
be found (and continues to not be found, it keeps checking regularly) while trying to merge
the metadata records. Here's the error:
> {noformat}
> 2013-08-14 11:54:27,246 [master.Master] ERROR: Unable merge metadata table records
> org.apache.accumulo.core.client.AccumuloException: java.io.IOException: Could not find
file /20//c-00000000 in [hdfs://localhost:9000/accumulo/tables]
>         at org.apache.accumulo.server.master.TabletGroupWatcher.mergeMetadataRecords(TabletGroupWatcher.java:548)
>         at org.apache.accumulo.server.master.TabletGroupWatcher.updateMergeState(TabletGroupWatcher.java:368)
>         at org.apache.accumulo.server.master.TabletGroupWatcher.run(TabletGroupWatcher.java:263)
> Caused by: java.io.IOException: Could not find file /20//c-00000000 in [hdfs://localhost:9000/accumulo/tables]
>         at org.apache.accumulo.server.fs.VolumeManagerImpl.getFullPath(VolumeManagerImpl.java:446)
>         at org.apache.accumulo.server.util.MetadataTableUtil.createDeleteMutation(MetadataTableUtil.java:501)
>         at org.apache.accumulo.server.master.TabletGroupWatcher.mergeMetadataRecords(TabletGroupWatcher.java:502)
>         ... 2 more
> {noformat}
> And the metadata table had c-00000000 listed here:
> {noformat}
> root@802 !METADATA> grep c-00000
> 20;00b581d7479230dd srv:dir []    /c-00000000
> 20< srv:dir []    /c-00000001
> {noformat}
> I was testing my table namespaces code but this seemed like an unrelated issue.



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