Is there any connection leakage (derby datasource) problem with JBOSS 6

[amol.p.dongare]

Hi,

I am developing an application, wherein I have configured derby 10.8.2.2 database as my datasource in JBOSS 6. I used

<min-pool-size>20</min-pool-size> <max-pool-size>300</max-pool-size> in my <xa-datasource> and used 400 drda threads in derby.properties file. But after some time i found that active connection count goes beyond 300 and and applicatiojn throws"Unable to get managed connection" exception

Please find below my configuration details -

         <min-pool-size>20</min-pool-size>

        <max-pool-size>300</max-pool-size>

        <blocking-timeout-millis>60000</blocking-timeout-millis>

        <idle-timeout-minutes>2</idle-timeout-minutes>

        <check-valid-connection-sql>select 1 from SYSIBM.SYSDUMMY1</check-valid-connection-sql>

        <background-validation-millis>5000</background-validation-millis>

        <allocation-retry>3</allocation-retry>

        <allocation-retry-wait-millis>1000</allocation-retry-wait-millis>

        <no-tx-separate-pools />

        <xa-resource-timeout>0</xa-resource-timeout>

Below are my derby.properties contents

          derby.storage.pageCacheSize=4000

          derby.storage.pageSize=4096

          derby.locks.escalationThreshold=100

          derby.drda.portNumber=57747

          derby.drda.logConnections=true

          derby.drda.maxThreads=650

          derby.drda.timeSlice=2000

          derby.stream.error.logSeverityLevel=0

Can anyone let me know why JBOSS failed to release steal connection? I closed my connection whever I have opend.

I am using EJB-QL.

One more quation  - does EJB-QL releases connection after usage?

Please help me...I am in deep sea.

[amol.p.dongare]

Any idea about my above queation....