Tihomir Meščić created LOG4J2-457:
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Summary: JDBCAppender does not release JDBC connections to the
connection pool when WAR/EAR is stopped
Key: LOG4J2-457
URL: https://issues.apache.org/jira/browse/LOG4J2-457
Project: Log4j 2
Issue Type: Bug
Components: Appenders
Affects Versions: 2.0-beta9
Environment: JBOSS application server, PostgreSQL database
Reporter: Tihomir Meščić
We use log4j 2 for logging inside our J2EE app (packaged as EAR, log4j JARs are
bundled inside). The app is deployed on JBOSS EAP 6.1 app server. We are using
the JDBCAppender for logging to a PostgreSQL database, and the appender is
configured to use a DataSource for fetching connections. The appender is
configured as follows:
<JDBC name="jdbcAppender" tableName="log_entries">
<DataSource jndiName="java:jboss/datasources/XyzDS" />
<Column name="log_entries_message" isUnicode="false" pattern="%message" />
<Column name="log_entries_type" literal="0" />
.....
The problem is: after the EAR is stopped (undeployed) log4j is not releasing
the JDBC connection back to the connection pool, and after we stop/start the
application a couple of times, our server becomes useless because there are no
more free connections in the connection pool. I've looked at the thread dump of
the server and there are a lot of threads like this:
org.apache.logging.log4j.core.LoggerContext$ShutdownThread @ 0xbe447138
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