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From "Mayuresh Nirhali (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2549) ArrayIndexOutOfBoundsException in SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE
Date Fri, 11 May 2007 06:56:15 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12494970
] 

Mayuresh Nirhali commented on DERBY-2549:
-----------------------------------------

Thanks Mike for clarifying the behavior.

On a second thought, Option 2 mentioned above would not be suitable because the size will
also have to changed for few other arrays and huge size might lead to OOME. The existing approach
as described in mike's comment sounds reasonable.

I debugged mike's quick patch and it seems that after reaching the limit (page is unlatched),
scan_position is not repositioned correctly. In fact, in this special case, on attempt to
fetch next group, no valid page is found. So, only 100 rows can be cleaned per Compress operation.

I will work on a follow up patch from tje patch mike attached. Thanks again mike.

> ArrayIndexOutOfBoundsException in SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE
> -------------------------------------------------------------------------
>
>                 Key: DERBY-2549
>                 URL: https://issues.apache.org/jira/browse/DERBY-2549
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.2.2.0
>         Environment: Linux 2.6.x, JRE 1.5.0_b7
>            Reporter: Kurt Huwig
>         Assigned To: Mayuresh Nirhali
>         Attachments: 2549-histogram.png, A2549Test.java, derby-2549-v1.diff, derby2549_mikem.diff,
DerbyDiskSpaceDiag.java
>
>
> I am doing this in my code:
> CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('SPONTS','" + "journal".toUpperCase(Locale.US)
+ "',1,1,1)")
> ("journal" is actually a String-variable, but I replaced it here for easier understanding)
> Sometime - not always - I am getting this exception:
> java.sql.SQLException: The exception 'java.lang.ArrayIndexOutOfBoundsException: 100'
was thrown while evaluating an expression. SQLSTATE: XJ001:
> Java exception: '100: java.lang.ArrayIndexOutOfBoundsException'.
>         at org.apache.derby.client.am.SQLExceptionFactory.getSQLException(Unknown Source)
>         at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
>         at org.apache.derby.client.am.Statement.execute(Unknown Source)
> [...]
> Caused by: org.apache.derby.client.am.SqlException: The exception 'java.lang.ArrayIndexOutOfBoundsException:
100' was thrown while evaluating an expression.
>  SQLSTATE: XJ001: Java exception: '100: java.lang.ArrayIndexOutOfBoundsException'.
>         at org.apache.derby.client.am.Statement.completeExecute(Unknown Source)
>         at org.apache.derby.client.net.NetStatementReply.parseEXCSQLSTTreply(Unknown
Source)
>         at org.apache.derby.client.net.NetStatementReply.readExecuteCall(Unknown Source)
>         at org.apache.derby.client.net.StatementReply.readExecuteCall(Unknown Source)
>         at org.apache.derby.client.net.NetStatement.readExecuteCall_(Unknown Source)
>         at org.apache.derby.client.am.Statement.readExecuteCall(Unknown Source)
>         at org.apache.derby.client.am.Statement.flowExecute(Unknown Source)
>         at org.apache.derby.client.am.Statement.executeX(Unknown Source)
>         ... 12 more

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