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https://issues.apache.org/jira/browse/LUCENE-2618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12923995#action_12923995
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Michael McCandless commented on LUCENE-2618:
--------------------------------------------
bq. Does this mean I'll need to catch that exception every time I close an IW,
or at least prepare to catch it?
Well, IndexFormatTooOldExc subclasses IOE... but, yes, if there's a risk you'll
open a too-old index, you should try to handle this.
IW.close does alot... flush the last segment, let MS run any pending merges, do
commit, delete now-not-need files, etc. So there's plenty of chances for
interested excs.
bq. Is it only relevant to the test?
Well, this test opens an IW on a too-old index... so if your app may do that....
bq. Can IW swallow those exceptions internally, and relieve the application
from all this?
Whoa no way!
> Intermittent failure in 3.x's backwards TestThreadedOptimize
> ------------------------------------------------------------
>
> Key: LUCENE-2618
> URL: https://issues.apache.org/jira/browse/LUCENE-2618
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Reporter: Michael McCandless
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2618.patch, LUCENE-2618.patch
>
>
> Failure looks like this:
> {noformat}
> [junit] Testsuite: org.apache.lucene.index.TestThreadedOptimize
> [junit] Testcase:
> testThreadedOptimize(org.apache.lucene.index.TestThreadedOptimize): FAILED
> [junit] null
> [junit] junit.framework.AssertionFailedError: null
> [junit] at
> org.apache.lucene.index.TestThreadedOptimize.runTest(TestThreadedOptimize.java:125)
> [junit] at
> org.apache.lucene.index.TestThreadedOptimize.testThreadedOptimize(TestThreadedOptimize.java:149)
> [junit] at
> org.apache.lucene.util.LuceneTestCase.runBare(LuceneTestCase.java:253)
> {noformat}
> I just committed some verbosity so next time it strikes we'll have more
> details.
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