Re: OverlappingFileLockException when using startup

[rabahb <ra...@gmail.com>]

Hi Guys,

I'm experiencing the same issue with a single war. I'm using a brand new
Solr war built from yestertay's version of the trunk. 

I've got one master with 2 cores and one slave with a single core. I'm using
one core from master as the master of the second core (which is configured
as a repeater). So that, the slave's core can poll the repeater for index
changes. 

( I was using solr 1.4, but experienced some issues with replication. While
rebuilding the index on the one master core, the new index was not
replicated succesfully to the other master core. Files were copied over but
the final commit failed on the snappuller. But sometimes, while restarting
the master, the replication would work fine between  master cores, then no
replication would be successful from master to slave core. I had the same
issue as described here: https://issues.apache.org/jira/browse/SOLR-1769 .
Which seems to be fixed in the trunk.

So I moved on to the trunk version of solr in order to tests the fix. This
seems to work better. As master cores replication works fine. But I've got a
weird behavior on slave. The index replication is successful only the second
time the slave is trying to get it even if for each replication trial, slave
spits out the following Exception (see below).

There seems to be a concurrrency issue but I don't quite undestand where the
concurrency is really happening. Can you please help on that issue?

org.apache.solr.common.SolrException: Index fetch failed :
        at
org.apache.solr.handler.SnapPuller.fetchLatestIndex(SnapPuller.java:329)
        at
org.apache.solr.handler.ReplicationHandler.doFetch(ReplicationHandler.java:264)
        at org.apache.solr.handler.SnapPuller$1.run(SnapPuller.java:159)
        at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
        at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecu                                         
tor.java:98)
        at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExec                                         
utor.java:181)
        at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.jav                                         
a:205)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.nio.channels.OverlappingFileLockException
        at
sun.nio.ch.FileChannelImpl$SharedFileLockTable.checkList(FileChannelImpl.java:1170)
        at
sun.nio.ch.FileChannelImpl$SharedFileLockTable.add(FileChannelImpl.java:1072)
        at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:878)
        at java.nio.channels.FileChannel.tryLock(FileChannel.java:962)
        at
org.apache.lucene.store.NativeFSLock.obtain(NativeFSLockFactory.java:260)
        at org.apache.lucene.store.Lock.obtain(Lock.java:72)
        at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1061)
        at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:950)
        at
org.apache.solr.update.SolrIndexWriter.<init>(SolrIndexWriter.java:192)
        at
org.apache.solr.update.UpdateHandler.createMainIndexWriter(UpdateHandler.java:99)
        at
org.apache.solr.update.DirectUpdateHandler2.openWriter(DirectUpdateHandler2.java:173)
        at
org.apache.solr.update.DirectUpdateHandler2.forceOpenWriter(DirectUpdateHandler2.java:376)
        at org.apache.solr.handler.SnapPuller.doCommit(SnapPuller.java:471)
        at
org.apache.solr.handler.SnapPuller.fetchLatestIndex(SnapPuller.java:319)
        ... 11 more
 




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