[jira] Updated: (DERBY-676) OutOfMemoryError in Network Server while performing operations using one of the two Statement objects created from a Connection object

["Rajesh Kartha (JIRA)" <de...@db.apache.org>]

     [ http://issues.apache.org/jira/browse/DERBY-676?page=all ]

Rajesh Kartha updated DERBY-676:
--------------------------------

    Attachment: JdbcTask.java
                ReproTest.java

Repro attached

> OutOfMemoryError in Network Server while performing operations using one of the two Statement objects created from a Connection object
> --------------------------------------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-676
>          URL: http://issues.apache.org/jira/browse/DERBY-676
>      Project: Derby
>         Type: Bug
>   Components: Network Server
>     Versions: 10.0.2.1, 10.1.1.0, 10.2.0.0, 10.1.1.1
>  Environment: Windows 2000
>     Reporter: Rajesh Kartha
>  Attachments: JdbcTask.java, ReproTest.java
>
> The NetworkServer throws an OutOfMemoryError  if there exists two Statement objects from a Connection object, but only one of them is being actively used
> for insert/select operations.  I noticed 100% CPU usage and the memory usage of Network Server JVM steadily growing,  so suspect a memory leak.
> The attached test reproduces it.  With the default setting of maz heap size the Exception ocurs in about 12-15 mins during the 'select' operation. By setting  the max heap size  -Xmx for  the Network Server JVM  to a smaller value the error happnes much earlier.
> The test is very simple and uses plain Statement objects, which get closed after every insert/select. I tried the same test in the Embedded mode and did not see any errors.

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