Tomcat and SEVERE messages in the output

Enrique_Medina_Monte · April 24, 2011, 7:01pm

Hi,

I'm trying to pinpoint some issues I have with my current environment, and
found a bunch of this messages in the Tomcat console output:

Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02])
and a value of t
ype [java.lang.Boolean] (value [false]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1])
and a value of t
ype [java.lang.Integer] (value [0]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value [org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b])
and a value of type [org.elasticsearch.common.thre
ad.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@3a3396c1]) but
failed to remove it when the web application was stopped. This is very
likely to create
a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value [org.elasticsearch.common.Unicode$2@72ab5b9c]) and a value of type
[org.elasticsearch.common.thread.ThreadLocals.Clean
ableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@10ee76c1]) but
failed to remove it when the web application was stopped. This is very
likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@27f687c7])
and a value of type [j
ava.util.ArrayList] (value [[]]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.elasticsearch.common.io.FastByteArrayOutputStream$Cached$1@2a4c2e50])
and a value of type [org.elasticsearch.comm
on.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@17b68196]) but
failed to remove it when the web application was stopped. This is very
likely to
create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02])
and a value of t
ype [java.lang.Boolean] (value [false]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1])
and a value of t
ype [java.lang.Integer] (value [0]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value [org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b])
and a value of type [org.elasticsearch.common.thre
ad.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@4ef5ab03]) but
failed to remove it when the web application was stopped. This is very
likely to create
a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type
[java.lang.ThreadLocal] (value [java.lang.ThreadLocal@33d3a0bf]) and a value
of type [org.springframework.security.context.SecurityC
ontextImpl] (value
[org.springframework.security.context.SecurityContextImpl@ffffffff: Null
authentication]) but failed to remove it when the web application was
stopped. This is very likely to create a
memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value [org.elasticsearch.common.Unicode$2@72ab5b9c]) and a value of type
[org.elasticsearch.common.thread.ThreadLocals.Clean
ableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@62ae7a74]) but
failed to remove it when the web application was stopped. This is very
likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@27f687c7])
and a value of type [j
ava.util.ArrayList] (value [[]]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.elasticsearch.common.io.FastByteArrayOutputStream$Cached$1@2a4c2e50])
and a value of type [org.elasticsearch.comm
on.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@2ce98849]) but
failed to remove it when the web application was stopped. This is very
likely to
create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02])
and a value of t
ype [java.lang.Boolean] (value [false]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1])
and a value of t
ype [java.lang.Integer] (value [0]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap
SEVERE: The web application [] created a ThreadLocal with key of type [null]
(value [org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b])
and a value of type [org.elasticsearch.common.thre
ad.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@17f287a8]) but
failed to remove it when the web application was stopped. This is very
likely to create
a memory leak.

I know that ES has nothing to be with Tomcat, but indeed my web application
which uses ES is deployed in Tomcat, so I was wondering if anyone has a clue
on whether I should just ignore these messages or pay them some attention,
and how to proceed.

Thanks.

kimchy · April 24, 2011, 7:39pm

Most of those are not related to elasticsearch, but of those that are, are you closing the Node / Client you are starting?
On Sunday, April 24, 2011 at 10:01 PM, Enrique Medina Montenegro wrote:

Hi,

I'm trying to pinpoint some issues I have with my current environment, and found a bunch of this messages in the Tomcat console output:

Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02]) and a value of t
ype [java.lang.Boolean] (value [false]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1]) and a value of t
ype [java.lang.Integer] (value [0]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b]) and a value of type [org.elasticsearch.common.thre
ad.ThreadLocals.CleanableValue] (value [org.elasticsearch.common.thread.ThreadLocals$CleanableValue@3a3396c1]) but failed to remove it when the web application was stopped. This is very likely to create
a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.elasticsearch.common.Unicode$2@72ab5b9c]) and a value of type [org.elasticsearch.common.thread.ThreadLocals.Clean
ableValue] (value [org.elasticsearch.common.thread.ThreadLocals$CleanableValue@10ee76c1]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@27f687c7]) and a value of type [j
ava.util.ArrayList] (value []) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.elasticsearch.common.io.FastByteArrayOutputStream$Cached$1@2a4c2e50]) and a value of type [org.elasticsearch.comm
on.thread.ThreadLocals.CleanableValue] (value [org.elasticsearch.common.thread.ThreadLocals$CleanableValue@17b68196]) but failed to remove it when the web application was stopped. This is very likely to
create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02]) and a value of t
ype [java.lang.Boolean] (value [false]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1]) and a value of t
ype [java.lang.Integer] (value [0]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b]) and a value of type [org.elasticsearch.common.thre
ad.ThreadLocals.CleanableValue] (value [org.elasticsearch.common.thread.ThreadLocals$CleanableValue@4ef5ab03]) but failed to remove it when the web application was stopped. This is very likely to create
a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@33d3a0bf]) and a value of type [org.springframework.security.context.SecurityC
ontextImpl] (value [org.springframework.security.context.SecurityContextImpl@ffffffff: Null authentication]) but failed to remove it when the web application was stopped. This is very likely to create a
memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.elasticsearch.common.Unicode$2@72ab5b9c]) and a value of type [org.elasticsearch.common.thread.ThreadLocals.Clean
ableValue] (value [org.elasticsearch.common.thread.ThreadLocals$CleanableValue@62ae7a74]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@27f687c7]) and a value of type [j
ava.util.ArrayList] (value []) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.elasticsearch.common.io.FastByteArrayOutputStream$Cached$1@2a4c2e50]) and a value of type [org.elasticsearch.comm
on.thread.ThreadLocals.CleanableValue] (value [org.elasticsearch.common.thread.ThreadLocals$CleanableValue@2ce98849]) but failed to remove it when the web application was stopped. This is very likely to
create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02]) and a value of t
ype [java.lang.Boolean] (value [false]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1]) and a value of t
ype [java.lang.Integer] (value [0]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Apr 24, 2011 8:35:49 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application created a ThreadLocal with key of type [null] (value [org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b]) and a value of type [org.elasticsearch.common.thre
ad.ThreadLocals.CleanableValue] (value [org.elasticsearch.common.thread.ThreadLocals$CleanableValue@17f287a8]) but failed to remove it when the web application was stopped. This is very likely to create
a memory leak.

I know that ES has nothing to be with Tomcat, but indeed my web application which uses ES is deployed in Tomcat, so I was wondering if anyone has a clue on whether I should just ignore these messages or pay them some attention, and how to proceed.

Thanks.

Barsk · April 26, 2011, 3:38pm

Hi, 




Just as a hint about how to (possibly) catch the cause of this. I
too use Tomcat but have no such issues.




I use NodeClient as my client type and in one of the webapps that is
a standard servlet based app I create the node instanceÂ  in the
servlet init() method, and remove it in the destroy() method. These
are the standard servlet lifecycle methods called on init and
destroy of the servlet.




In my other webapp that is Spring based I use the Spring beans
configuration like this:


&lt;bean id="esManager"
class="se.devo.bertmarks.service.impl.ElasticSearchManagerImpl" 


Â Â Â Â  Â Â Â  init-method="init" Â Â Â  destroy-method="destroy"&gt;


Â Â Â Â  Â Â Â  &lt;property name="clusterName"
value="${es.clusterName}"/&gt;


Â Â Â Â  Â Â Â  &lt;property name="index" value="${es.index}"/&gt;


Â Â Â Â  Â Â Â  &lt;property name="type" value="${es.type}"/&gt;


Â  &lt;/bean&gt;




The init-method and destroy-methods are called when the spring bean
is created and destroyed. In my case these are called simply init()
and destroy() just as in the servlet variant. 




/Kristian


Â Â Â Â  




Shay Banon skrev 2011-04-24 21:39:
<blockquote cite="mid:697E1141B1BB4A3499AEF2B7F8D8BB04@elasticsearch.com" type="cite">Most of those are not related to elasticsearch, but
        of those that are, are you closing the Node / Client you are
        starting?

On Sunday, April 24, 2011 at 10:01 PM, Enrique Medina Montenegro wrote:

Hi,
I'm trying to pinpoint some issues I have with my
current environment, and found a bunch of this
messages in the Tomcat console output:

Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02])
and a value of type [java.lang.Boolean] (value [false]) but
failed to remove it when the web application was
stopped. This is very likely to create a memory
leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1])
and a value of type [java.lang.Integer] (value [0]) but failed
to remove it when the web application was stopped.
This is very likely to create a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b])
and a value of type [org.elasticsearch.common.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@3a3396c1])
but failed to remove it when the web application
was stopped. This is very likely to createÂ a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.elasticsearch.common.Unicode$2@72ab5b9c]) and
a value of type
[org.elasticsearch.common.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@10ee76c1])
but failed to remove it when the web application
was stopped. This is very likely to create a
memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@27f687c7])
and a value of type [java.util.ArrayList] (value []) but failed to
remove it when the web application was stopped.
This is very likely to create a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.elasticsearch.common.io.FastByteArrayOutputStream$Cached$1@2a4c2e50])
and a value of type [org.elasticsearch.common.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@17b68196])
but failed to remove it when the web application
was stopped. This is very likely toÂ create a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02])
and a value of type [java.lang.Boolean] (value [false]) but
failed to remove it when the web application was
stopped. This is very likely to create a memory
leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1])
and a value of type [java.lang.Integer] (value [0]) but failed
to remove it when the web application was stopped.
This is very likely to create a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b])
and a value of type [org.elasticsearch.common.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@4ef5ab03])
but failed to remove it when the web application
was stopped. This is very likely to createÂ a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type
[java.lang.ThreadLocal] (value
[java.lang.ThreadLocal@33d3a0bf]) and a value of
type
[org.springframework.security.context.SecurityContextImpl] (value
[org.springframework.security.context.SecurityContextImpl@ffffffff:
Null authentication]) but failed to remove it when
the web application was stopped. This is very
likely to create aÂ memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.elasticsearch.common.Unicode$2@72ab5b9c]) and
a value of type
[org.elasticsearch.common.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@62ae7a74])
but failed to remove it when the web application
was stopped. This is very likely to create a
memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@27f687c7])
and a value of type [java.util.ArrayList] (value []) but failed to
remove it when the web application was stopped.
This is very likely to create a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.elasticsearch.common.io.FastByteArrayOutputStream$Cached$1@2a4c2e50])
and a value of type [org.elasticsearch.common.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@2ce98849])
but failed to remove it when the web application
was stopped. This is very likely toÂ create a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@14413f02])
and a value of type [java.lang.Boolean] (value [false]) but
failed to remove it when the web application was
stopped. This is very likely to create a memory
leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@478fa6b1])
and a value of type [java.lang.Integer] (value [0]) but failed
to remove it when the web application was stopped.
This is very likely to create a memory leak.Apr 24, 2011 8:35:49 PM
org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMapSEVERE: The web application created a
ThreadLocal with key of type [null] (value
[org.elasticsearch.common.io.stream.CachedStreamOutput$1@2808d32b])
and a value of type [org.elasticsearch.common.thread.ThreadLocals.CleanableValue] (value
[org.elasticsearch.common.thread.ThreadLocals$CleanableValue@17f287a8])
but failed to remove it when the web application
was stopped. This is very likely to createÂ a memory leak.

I know that ES has nothing to be with Tomcat,
but indeed my web application which uses ES is
deployed in Tomcat, so I was wondering if anyone
has a clue on whether I should just ignore these
messages or pay them some attention, and how to
proceed.

Thanks.

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Tomcat and SEVERE messages in the output

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