[
https://issues.apache.org/jira/browse/XMLBEANS-502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Christopher Brown updated XMLBEANS-502:
---------------------------------------
Description:
Hello,
After creating this issue
https://issues.apache.org/bugzilla/show_bug.cgi?id=55149 I was advised to
create the issue here. This appears to be similar to
https://issues.apache.org/jira/browse/XMLBEANS-103 but as it's marked as FIXED
and as I'm using a more recent version (and as it's not completely identical),
I'm creating a new issue.
It would appear that XMLBeans is creating (and not clearing) ThreadLocal
variables. This causes Tomcat to complain about classloader leaks (see
messages below). Based on information in XMLBEANS-103, I have tried to coax
the JVM to clear the ThreadLocal (by performing garbage collection on the JVM),
but that doesn't clear the ThreadLocals, even if allowing time to elapse AFTER
using POI to process an XSSF document and BEFORE stopping Tomcat.
To workaround this, we're having to impose long downtime when a restart is
required. Perhaps a utility class within XMLBeans could be made available with
the POI distribution such as:
XMLBeansCache.clearThreadLocals()
...that I could call from a "finally" block after processing the XSSF document?
Here's the information from Tomcat's logs:
SEVERE: The web application [/foobar] created a ThreadLocal with key of type
[org.apache.xmlbeans.XmlBeans$1] (value
[org.apache.xmlbeans.XmlBeans$1@7d3aace]) and a value of type
[java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@5972be65])
but failed to remove it when the web application was stopped. This is very
likely to create a memory leak.
Jun 26, 2013 7:01:56 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [/foobar] created a ThreadLocal with key of type
[org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1] (value
[org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1@7c3206c3]) and a value
of type [java.util.ArrayList] (value [[java.lang.ref.SoftReference@385a2be8]])
but failed to remove it when the web application was stopped. This is very
likely to create a memory leak.
Jun 26, 2013 7:01:56 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [/foobar] created a ThreadLocal with key of type
[org.apache.xmlbeans.impl.store.Locale$1] (value
[org.apache.xmlbeans.impl.store.Locale$1@27f8a93f]) and a value of type
[java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@362f7b99])
but failed to remove it when the web application was stopped. This is very
likely to create a memory leak.
Jun 26, 2013 7:01:56 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [/foobar] created a ThreadLocal with key of type
[org.apache.xmlbeans.impl.store.CharUtil$1] (value
[org.apache.xmlbeans.impl.store.CharUtil$1@675b9599]) and a value of type
[java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@2dbaa4d2])
but failed to remove it when the web application was stopped. This is very
likely to create a memory leak.
was:
Hello,
After creating this issue
https://issues.apache.org/bugzilla/show_bug.cgi?id=55149 I was advised to
create the issue here. This appears to be similar to
https://issues.apache.org/jira/browse/XMLBEANS-103 but as it's marked as FIXED
and as I'm using a more recent version (and as it's not completely identical),
I'm creating a new issue.
It would appear that XMLBeans is creating (and not clearing) ThreadLocal
variables. This causes Tomcat to complain about classloader leaks (see
messages below). Based on information in XMLBEANS-103, I have tried to coax
the JVM to clear the ThreadLocal (by performing garbage collection on the JVM),
but that doesn't clear the ThreadLocals, even if allowing time to elapse AFTER
using POI to process an XSSF document and BEFORE stopping Tomcat.
To workaround this, we're having to impose long downtime when a restart is
required. Perhaps a utility class within XMLBeans could be made available with
the POI distribution such as:
XMLBeansCache.clearThreadLocals()
...that I could call from a "finally" block after processing the XSSF document?
> Usage of XmlBeans triggers "clearThreadLocalMap" warnings in Tomcat with XSSF
> -----------------------------------------------------------------------------
>
> Key: XMLBEANS-502
> URL: https://issues.apache.org/jira/browse/XMLBEANS-502
> Project: XMLBeans
> Issue Type: Bug
> Affects Versions: Version 2.3
> Environment: Apache Tomcat 6.0.35, Apache POI 3.9-20121203, Java SE
> 6/7, any operating system
> Reporter: Christopher Brown
>
> Hello,
> After creating this issue
> https://issues.apache.org/bugzilla/show_bug.cgi?id=55149 I was advised to
> create the issue here. This appears to be similar to
> https://issues.apache.org/jira/browse/XMLBEANS-103 but as it's marked as
> FIXED and as I'm using a more recent version (and as it's not completely
> identical), I'm creating a new issue.
> It would appear that XMLBeans is creating (and not clearing) ThreadLocal
> variables. This causes Tomcat to complain about classloader leaks (see
> messages below). Based on information in XMLBEANS-103, I have tried to coax
> the JVM to clear the ThreadLocal (by performing garbage collection on the
> JVM), but that doesn't clear the ThreadLocals, even if allowing time to
> elapse AFTER using POI to process an XSSF document and BEFORE stopping Tomcat.
> To workaround this, we're having to impose long downtime when a restart is
> required. Perhaps a utility class within XMLBeans could be made available
> with the POI distribution such as:
> XMLBeansCache.clearThreadLocals()
> ...that I could call from a "finally" block after processing the XSSF
> document?
> Here's the information from Tomcat's logs:
> SEVERE: The web application [/foobar] created a ThreadLocal with key of type
> [org.apache.xmlbeans.XmlBeans$1] (value
> [org.apache.xmlbeans.XmlBeans$1@7d3aace]) and a value of type
> [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@5972be65])
> but failed to remove it when the web application was stopped. This is very
> likely to create a memory leak.
> Jun 26, 2013 7:01:56 PM org.apache.catalina.loader.WebappClassLoader
> clearThreadLocalMap
> SEVERE: The web application [/foobar] created a ThreadLocal with key of type
> [org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1] (value
> [org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1@7c3206c3]) and a
> value of type [java.util.ArrayList] (value
> [[java.lang.ref.SoftReference@385a2be8]]) but failed to remove it when the
> web application was stopped. This is very likely to create a memory leak.
> Jun 26, 2013 7:01:56 PM org.apache.catalina.loader.WebappClassLoader
> clearThreadLocalMap
> SEVERE: The web application [/foobar] created a ThreadLocal with key of type
> [org.apache.xmlbeans.impl.store.Locale$1] (value
> [org.apache.xmlbeans.impl.store.Locale$1@27f8a93f]) and a value of type
> [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@362f7b99])
> but failed to remove it when the web application was stopped. This is very
> likely to create a memory leak.
> Jun 26, 2013 7:01:56 PM org.apache.catalina.loader.WebappClassLoader
> clearThreadLocalMap
> SEVERE: The web application [/foobar] created a ThreadLocal with key of type
> [org.apache.xmlbeans.impl.store.CharUtil$1] (value
> [org.apache.xmlbeans.impl.store.CharUtil$1@675b9599]) and a value of type
> [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@2dbaa4d2])
> but failed to remove it when the web application was stopped. This is very
> likely to create a memory leak.
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