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Details

Type: Bug
Resolution: Done
Priority: Major
Fix Version/s: 7.3.5.GA, 7.3.5.CR1
Affects Version/s: None
Component/s: JCA
Labels:
None

QE Test Coverage:
+
Target Release:

7.3.z.GA
Workaround Description:

Hide

Restart JBoss EAP process after JDBC driver as jar deployment is redeployed

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Restart JBoss EAP process after JDBC driver as jar deployment is redeployed
Git Pull Request:
https://github.com/jbossas/jboss-eap7/pull/3793, https://github.com/jbossas/wildfly-core-eap/pull/964
Steps to Reproduce:
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Deploy JDBC driver as jar deployment as instructed in the configuration guide
https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/html/configuration_guide/datasource_management#install_a_jdbc_driver_as_a_jar_deployment

Reload configuration by reload command
Reload command will redeploy all deployments and triggers JDBC driver redeployment.

Here is a heap dump of leak situation. You can find duplicated PostgreSQL JDBC driver classes.

https://drive.google.com/file/d/1z-fRHyaXLGO_dJBB_A3q-gJ_xMGCo5ec/view?usp=sharing (requires Red Hat internal IDP login)
Show
Deploy JDBC driver as jar deployment as instructed in the configuration guide https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/html/configuration_guide/datasource_management#install_a_jdbc_driver_as_a_jar_deployment Reload configuration by reload command Reload command will redeploy all deployments and triggers JDBC driver redeployment. Here is a heap dump of leak situation. You can find duplicated PostgreSQL JDBC driver classes. https://drive.google.com/file/d/1z-fRHyaXLGO_dJBB_A3q-gJ_xMGCo5ec/view?usp=sharing (requires Red Hat internal IDP login)

SFDC Cases Counter:
SFDC Cases Links:

Description

Class loader leaks when JDBC driver as jar deployment is undeloyed. It will eventually leads to Metaspace out of memory error when "-XX:MaxMetaspaceSize" option is specified.

Normally JDBC driver is not undeloyed or redeployed by user frequently, but configuration reload command, which is regularly used, also triggers JDBC driver redeployment and cause class loader leak.
JDBC driver should be deregistered while undeloying.

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java.sql.debug
7 kB
2020/07/15 4:49 PM
mat-screenshot-1.png
126 kB
2020/07/15 4:49 PM
mat-screenshot-2.png
145 kB
2020/07/15 4:49 PM
mat-screenshot-3.png
127 kB
2020/07/15 4:49 PM

Activity

People

Assignee:: Moulali Shikalwadi

Reporter:: Yoshikazu Nojima (Inactive)

Votes:: 0 Vote for this issue

Watchers:: 11 Start watching this issue

Dates

Created:: 2020/07/06 9:49 PM

Updated:: 2021/10/24 6:23 AM

Resolved:: 2020/12/13 11:20 PM