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From Chris Harris <rygu...@gmail.com>
Subject FileNotFoundException in Java replication handler backups
Date Mon, 28 Sep 2009 21:36:48 GMT
Thanks to Noble Paul, I think I now understand the Java replication
handler's backup feature. It seems to work as expected on a toy index.
When trying it out on a copy of my production index (300GB-ish),
though, I'm getting FileNotFoundExceptions. These cancel the backup,
and delete the snapshot.yyyymmdd* directory. It seems reproducible, in
that every time I try to make a backup it will fail the same way.

This is Solr r815830. I'm not sure if this is something that would
potentially be addressed by SOLR-1458? (That patch is from after
r815830.)

For now I'm not using any event-based backup triggers; instead I'm
manually hitting

http://master_host:port/solr/replication?command=backup

This successfully sets off a snapshot, as seen in a thread dump.
However, after a while the snapshot fails. I'll paste in a couple of
stack traces below.

I haven't seen any other evidence that my index is corrupt; in
particular, searching the index and Java-based replication seem to be
working fine. I'm currently checking the index with the Lucene
CheckIndex tool to see if it detects any problems. I'll let you know
if this turns up any corruption.

Any suggestions about what to try next? Would you recommend trying
with a build with SOLR-1458 applied?

********************

Sep 28, 2009 9:32:18 AM org.apache.solr.handler.SnapShooter createSnapshot
SEVERE: Exception while creating snapshot
java.io.FileNotFoundException: Source
'E:\tomcat\solrstuff\solr\filingcore\data\index\_y0w.fnm' does not
exist
	at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:637)
	at org.apache.commons.io.FileUtils.copyFileToDirectory(FileUtils.java:587)
	at org.apache.solr.handler.SnapShooter.createSnapshot(SnapShooter.java:83)
	at org.apache.solr.handler.SnapShooter$1.run(SnapShooter.java:61)

Sep 28, 2009 10:39:43 AM org.apache.solr.handler.SnapShooter createSnapshot
SEVERE: Exception while creating snapshot
java.io.FileNotFoundException: Source
'E:\tomcat\solrstuff\solr\filingcore\data\index\segments_by' does not
exist
	at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:637)
	at org.apache.commons.io.FileUtils.copyFileToDirectory(FileUtils.java:587)
	at org.apache.solr.handler.SnapShooter.createSnapshot(SnapShooter.java:83)
	at org.apache.solr.handler.SnapShooter$1.run(SnapShooter.java:61)


Sep 28, 2009 11:52:08 AM org.apache.solr.handler.SnapShooter createSnapshot
SEVERE: Exception while creating snapshot
java.io.FileNotFoundException: Source
'E:\tomcat\solrstuff\solr\filingcore\data\index\_yby.nrm' does not
exist
	at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:637)
	at org.apache.commons.io.FileUtils.copyFileToDirectory(FileUtils.java:587)
	at org.apache.solr.handler.SnapShooter.createSnapshot(SnapShooter.java:83)
	at org.apache.solr.handler.SnapShooter$1.run(SnapShooter.java:61)

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