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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4773) Derby Network service mode creates a lot of generated classes (extends BaseActivation).
Date Fri, 13 Aug 2010 14:28:16 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898250#action_12898250
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Rick Hillegas commented on DERBY-4773:
--------------------------------------

Each generated class file represents the query plan for an SQL statement processed by Derby's
SQL interpreter. Those generated classes extend BaseActivation and have names which look like
the class names you are seeing. Normally, the generated classes are internal to Derby. However,
you can cause Derby to dump the class files to disk by setting the following flag when you
start the VM:

  -Dderby.debug.true=DumpClassFile

I don't know any other way to force Derby to dump those class files to disk. If you figure
out how you coaxed Derby into dumping those class files, that will help us debug this problem.
Thanks.

> Derby Network service mode creates a lot of generated classes (extends BaseActivation).
> ---------------------------------------------------------------------------------------
>
>                 Key: DERBY-4773
>                 URL: https://issues.apache.org/jira/browse/DERBY-4773
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC
>    Affects Versions: 10.6.1.0
>         Environment: Suse Linux 11, Hive 5.0, Hadoop v.20.1
>            Reporter: Soundararajan Velu
>             Fix For: 10.6.1.0
>
>
> When I run Derby as a Network service, due to some reason it created about 1800 generated
calss files (ac0a3c3082x012ax5c4fx64fcx00004650e8f2b.class, extends BaseActivation), I am
unable to figure out the reason and now unable to reproduce the situation again. Has anyone
faced this issue.

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