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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3888) getActiveScans should not eat TableNotFoundException
Date Mon, 15 Jun 2015 19:51:00 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14586558#comment-14586558
] 

Eric Newton commented on ACCUMULO-3888:
---------------------------------------

Sessions are cleaned up if the client goes away for a period of time.

Be default, that period of time is 3s.



> getActiveScans should not eat TableNotFoundException
> ----------------------------------------------------
>
>                 Key: ACCUMULO-3888
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3888
>             Project: Accumulo
>          Issue Type: Bug
>          Components: client
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>            Priority: Critical
>             Fix For: 1.8.0
>
>
> Noticed this awkwardness during integration tests running against a real cluster.
> {noformat}
> org.apache.accumulo.core.client.TableNotFoundException: Table (Id=r) does not exist
>  at org.apache.accumulo.core.client.impl.Tables.getTableName(Tables.java:128)
>  at org.apache.accumulo.core.client.impl.ActiveScanImpl.<init>(ActiveScanImpl.java:63)
>  at org.apache.accumulo.core.client.impl.InstanceOperationsImpl.getActiveScans(InstanceOperationsImpl.java:138)
>  at org.apache.accumulo.test.functional.ScanIdIT.testScanId(ScanIdIT.java:151)
> {noformat}
> The table from the previous test was deleted at the end of the test, but, somehow, a
tabletserver returned an ActiveScan for that table. When the client tried to unwrap the table
ID into a table name, it got a TableNotFoundException.
> Semantically, if a client is asking for active scans on a server, and the server reports
a scan for a table the client doesn't think exists, it's reasonable to assume it was just
deleted and not return that ActiveScan from the API call.
> Right now, this situation results in an exception back to the client and they get no
results.



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