[ACCUMULO-1653] Unable to merge during RandomWalk

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Assignee: Unassigned
• Reporter: Sean Hickey
• Created: 14/Aug/13 16:11
• Updated: 09/Nov/15 08:48
• Resolved: 26/Oct/13 02:15

Description

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:

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

And the metadata table had c-00000000 listed here:

root@802 !METADATA> grep c-00000
20;00b581d7479230dd srv:dir []    /c-00000000
20< srv:dir []    /c-00000001

I was testing my table namespaces code but this seemed like an unrelated issue.

Issue Links

• duplicates: ACCUMULO-1745 Merge broken on cloned tables