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« Return to Thread: Memory leak in Tomcat 5.5.16
Re: Memory leak in Tomcat 5.5.16
by Filip Hanik - Dev Lists
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try to disable the cache in conf/catalina.properties, at the bottom
there is a setting you can set to false
tomcat.util.buf.StringCache.byte.enabled=true
if the problem still exists, use jmap to dump the heap, and analyse the
actual dependencies for mem usage
Filip
Tom Price wrote:
> Hi,
>
> I have a Java application that exposes a web services (SOAP/XML)
> interface using Apache Tomcat and Axis2 (see detailed background below).
> When this interface is heavily utilized, the application gradually leaks
> old space memory until it runs out. I have analyzed the heap usage on a
> system where this memory leak has occurred, and I see that the following
> classes take up most of the memory:
>
> Size Count Class description
> -------------------------------------------------------
> 433059616 557692 char[]
> 292410472 124245 byte[]
> 17801560 87232 * ConstMethodKlass
> 16543576 295421 org.apache.tomcat.util.buf.MessageBytes
> 15600840 390021 org.apache.tomcat.util.buf.ByteChunk
> 13372920 334323 org.apache.tomcat.util.buf.CharChunk
> 11575656 482319 java.lang.String
>
> Does anyone know what could trigger the above classes to be leaked in
> Tomcat 5.5.16? I have also tried upgrading to Tomcat 5.5.26, but the
> problem still occurs.
>
> This is very similar to a memory leak posted to this list in 2006, but I
> can't find what the resolution was in that case:
>
> http://readlist.com/lists/tomcat.apache.org/users/5/27073.html
>
> I have also consulted http://wiki.apache.org/tomcat/OutOfMemory but
> couldn't find the solution.
>
> The problem only seems to occur when multiple concurrent requests are
> being received - if I issue requests in a single threaded manner, the
> server can handle many hundreds of thousands of requests over an
> extended period without any apparent memory leakage. But if multiple
> requests are sent concurrently, the application leaks about 1MB per 100
> requests.
>
> Here are the details of the application:
>
> OS: Solaris 10 (Intel)
> JRE: 1.5.0_07, launched from native C code (not the Java executable)
> Tomcat: 5.5.16, embedded within my Java application
> Axis2: 1.3
>
> Thanks in advance for any help.
>
> Tom.
>
> ---------------------------------------------------------------------
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> To unsubscribe, e-mail: users-unsubscribe@...
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>
>
>
>
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there is a setting you can set to false
tomcat.util.buf.StringCache.byte.enabled=true
if the problem still exists, use jmap to dump the heap, and analyse the
actual dependencies for mem usage
Filip
Tom Price wrote:
> Hi,
>
> I have a Java application that exposes a web services (SOAP/XML)
> interface using Apache Tomcat and Axis2 (see detailed background below).
> When this interface is heavily utilized, the application gradually leaks
> old space memory until it runs out. I have analyzed the heap usage on a
> system where this memory leak has occurred, and I see that the following
> classes take up most of the memory:
>
> Size Count Class description
> -------------------------------------------------------
> 433059616 557692 char[]
> 292410472 124245 byte[]
> 17801560 87232 * ConstMethodKlass
> 16543576 295421 org.apache.tomcat.util.buf.MessageBytes
> 15600840 390021 org.apache.tomcat.util.buf.ByteChunk
> 13372920 334323 org.apache.tomcat.util.buf.CharChunk
> 11575656 482319 java.lang.String
>
> Does anyone know what could trigger the above classes to be leaked in
> Tomcat 5.5.16? I have also tried upgrading to Tomcat 5.5.26, but the
> problem still occurs.
>
> This is very similar to a memory leak posted to this list in 2006, but I
> can't find what the resolution was in that case:
>
> http://readlist.com/lists/tomcat.apache.org/users/5/27073.html
>
> I have also consulted http://wiki.apache.org/tomcat/OutOfMemory but
> couldn't find the solution.
>
> The problem only seems to occur when multiple concurrent requests are
> being received - if I issue requests in a single threaded manner, the
> server can handle many hundreds of thousands of requests over an
> extended period without any apparent memory leakage. But if multiple
> requests are sent concurrently, the application leaks about 1MB per 100
> requests.
>
> Here are the details of the application:
>
> OS: Solaris 10 (Intel)
> JRE: 1.5.0_07, launched from native C code (not the Java executable)
> Tomcat: 5.5.16, embedded within my Java application
> Axis2: 1.3
>
> Thanks in advance for any help.
>
> Tom.
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@...
> To unsubscribe, e-mail: users-unsubscribe@...
> For additional commands, e-mail: users-help@...
>
>
>
>
---------------------------------------------------------------------
To start a new topic, e-mail: users@...
To unsubscribe, e-mail: users-unsubscribe@...
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