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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (ACCUMULO-667) Unexpected table not found exception
Date Tue, 18 Dec 2012 17:52:12 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-667?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christopher Tubbs resolved ACCUMULO-667.
----------------------------------------

    Resolution: Cannot Reproduce
      Assignee: Keith Turner
    
> Unexpected table not found exception
> ------------------------------------
>
>                 Key: ACCUMULO-667
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-667
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.4.0
>            Reporter: Keith Turner
>            Assignee: Keith Turner
>
> While running random walk test to kick the tires on a bulk import bug fix, I ran into
the following error.
> {noformat}
> 02 16:12:41,389 [randomwalk.Framework] ERROR: Error during random walk
> java.lang.Exception: Error running node Image.xml
>         at org.apache.accumulo.server.test.randomwalk.Module.visit(Module.java:259)
>         at org.apache.accumulo.server.test.randomwalk.Framework.run(Framework.java:61)
>         at org.apache.accumulo.server.test.randomwalk.Framework.main(Framework.java:114)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.accumulo.start.Main$1.run(Main.java:89)
>         at java.lang.Thread.run(Thread.java:662)
> Caused by: org.apache.accumulo.core.client.TableNotFoundException: Table img_n_17502_1341245561116
does not exist
>         at org.apache.accumulo.core.client.impl.Tables.getTableId(Tables.java:66)
>         at org.apache.accumulo.core.client.admin.TableOperationsImpl.addSplits(TableOperationsImpl.java:319)
>         at org.apache.accumulo.server.test.randomwalk.image.ImageFixture.setUp(ImageFixture.java:63)
>         at org.apache.accumulo.server.test.randomwalk.Module.visit(Module.java:190)
>         at org.apache.accumulo.server.test.randomwalk.Module.visit(Module.java:251)
>         ... 8 more
> {noformat}
> This exception corresponds to the following test code.  So addSplits() was called immediately
after createTable() and did not see the table.  
> {code:java}
>  try {
>       conn.tableOperations().create(imageTableName);
>       conn.tableOperations().addSplits(imageTableName, splits);   //line 319
>       log.debug("Created table " + imageTableName + " (id:" + Tables.getNameToIdMap(instance).get(imageTableName)
+ ")");
>     } catch (TableExistsException e) {
>       log.error("Table " + imageTableName + " already exists.");
>       throw e;
>     }
> {code}
> Saw the following in the master logs. The time on the machines involved is off a few
seconds. so the time discrepency does not indicate that the create table operation did not
wait before returning.
> {noformat}
> 02 16:12:43,063 [tableOps.Utils] INFO : table 16a (246815aaec0229bc) unlocked for write
> 02 16:12:43,063 [master.EventCoordinator] INFO : Created table img_n_17502_1341245561116
> 02 16:12:43,063 [tableOps.FinishCreateTable] DEBUG: Created table 16a img_n_17502_1341245561116
> {noformat}
> This could be a bug in ZooCache or maybe ZooCache needs to make a zookeeper sync() call
before reading data.

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