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Exception - Java heap space

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  Exception - Java heap space Magnus Warker <magnux@mailinator.com> - 2012-09-14 23:01 +0200
    Re: Exception - Java heap space Robert Klemme <shortcutter@googlemail.com> - 2012-09-14 23:09 +0200
      Re: Exception - Java heap space Lew <lewbloch@gmail.com> - 2012-09-14 14:19 -0700
        Re: Exception - Java heap space Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-09-14 15:06 -0700
    Re: Exception - Java heap space Roedy Green <see_website@mindprod.com.invalid> - 2012-09-16 08:23 -0700
      Re: Exception - Java heap space Lew <lewbloch@gmail.com> - 2012-09-16 16:58 -0700
    Re: Exception - Java heap space Kevin McMurtrie <mcmurtrie@pixelmemory.us> - 2012-09-18 22:25 -0700

#18774 — Exception - Java heap space

Hi,

below is an exception found in my tomcat log. It's a GWT app.

What is going on there?

Magnus

-----
Sep 14, 2012 10:58:14 PM org.apache.catalina.core.ApplicationContext log
SEVERE: Exception while dispatching incoming RPC call
java.lang.OutOfMemoryError: Java heap space
         at java.util.Arrays.copyOf(Arrays.java:2760)
         at java.util.Arrays.copyOf(Arrays.java:2734)
         at java.util.ArrayList.ensureCapacity(ArrayList.java:167)
         at java.util.ArrayList.add(ArrayList.java:351)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.append(ServerSerializationStreamWriter.java:583)
         at 
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeInt(AbstractSerializationStreamWriter.java:100)
         at 
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:116)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:153)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:539)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass(ServerSerializationStreamWriter.java:709)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:748)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:621)
         at 
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126)
         at 
com.google.gwt.user.client.rpc.core.java.util.Collection_CustomFieldSerializerBase.serialize(Collection_CustomFieldSerializerBase.java:44)
         at 
com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.serialize(ArrayList_CustomFieldSerializer.java:39)
         at 
com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.serializeInstance(ArrayList_CustomFieldSerializer.java:51)
         at 
com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.serializeInstance(ArrayList_CustomFieldSerializer.java:28)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:740)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:621)
         at 
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:153)
         at 
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:539)
         at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:616)
         at 
com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess(RPC.java:474)
         at 
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:571)
         at 
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
         at 
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
         at 
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

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#18777

On 14.09.2012 23:01, Magnus Warker wrote:
> Hi,
>
> below is an exception found in my tomcat log. It's a GWT app.
>
> What is going on there?
>
> Magnus
>
> -----
> Sep 14, 2012 10:58:14 PM org.apache.catalina.core.ApplicationContext log
> SEVERE: Exception while dispatching incoming RPC call
> java.lang.OutOfMemoryError: Java heap space
 > ...

Well, what do you think does OutOfMemoryError mean?  What does the 
class's JavaDoc say?  Beyond that since we have almost zero information 
and there's nobody with a crystal ball around (AFAIK) we'll have a hard 
time answering the question more thoroughly.

Cheers

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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#18778

Robert Klemme wrote:
> Magnus Warker wrote:
>> below is an exception found in my tomcat log. It's a GWT app.
> 
>> What is going on there?
> 
>> -----
>> Sep 14, 2012 10:58:14 PM org.apache.catalina.core.ApplicationContext log
>> SEVERE: Exception while dispatching incoming RPC call
>> java.lang.OutOfMemoryError: Java heap space
>> ...
> 
> Well, what do you think does OutOfMemoryError mean?  What does the 

Ooh! Ooh! I know! It means the JVM ran out of heap memory for new allocations.

> class's JavaDoc say?  Beyond that since we have almost zero information 
> and there's nobody with a crystal ball around (AFAIK) we'll have a hard 
> time answering the question more thoroughly.

One common cause is failure to let go of object references.

-- 
Lew

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#18780

On 9/14/12 2:19 PM, Lew wrote:
> Robert Klemme wrote:
>> Magnus Warker wrote:
>>> below is an exception found in my tomcat log. It's a GWT app.
>>
>>> What is going on there?
>>
>>> -----
>>> Sep 14, 2012 10:58:14 PM org.apache.catalina.core.ApplicationContext log
>>> SEVERE: Exception while dispatching incoming RPC call
>>> java.lang.OutOfMemoryError: Java heap space
>>> ...
>>
>> Well, what do you think does OutOfMemoryError mean?  What does the
>
> Ooh! Ooh! I know! It means the JVM ran out of heap memory for new allocations.
>
>> class's JavaDoc say?  Beyond that since we have almost zero information
>> and there's nobody with a crystal ball around (AFAIK) we'll have a hard
>> time answering the question more thoroughly.
>
> One common cause is failure to let go of object references.
>
Another (which seems as likely in this case) appending too much data to 
an automatically resizing buffer, such as a StringBuilder, or ArrayList. 
  Given the stack trace, it appears the be an ArrayList.

It could be the OP needs to increase the memory allowed. It also could 
be that too much data is being submitted (looks like a RPC<->gwt bridge, 
maybe they are sending the whole world).

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#18791

On Fri, 14 Sep 2012 23:01:55 +0200, Magnus Warker
<magnux@mailinator.com> wrote, quoted or indirectly quoted someone who
said :

>OutOfMemoryError

I presume you have no problem understanding what "out of memory"
means.  You want to know WHY this happened.

1. perhaps your problem is too big for the amount of RAM.  Change the
memory assignments on the java.exe command line. See
http://mindprod.com/jgloss/javaexe.html

2. Perhaps you are packratting, holding on to objects you don't really
need.  See http://mindprod.com/jgloss/packratting.html

3. You need a tool to figure out what is happening, letting you
monitor how many objects there are of various types. see
http://mindprod.com/jgloss/profiler.html
-- 
Roedy Green Canadian Mind Products http://mindprod.com
The iPhone 5 is a low end Rolex. 

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#18794

Roedy Green wrote:
> Magnus Warker wrote, quoted or indirectly quoted someone who said :
>>OutOfMemoryError
> 
> I presume you have no problem understanding what "out of memory"
> means.  You want to know WHY this happened.
> 
> 1. perhaps your problem is too big for the amount of RAM.  Change the
> memory assignments on the java.exe command line. See
> http://mindprod.com/jgloss/javaexe.html
> 
> 2. Perhaps you are packratting, holding on to objects you don't really
> need.  See http://mindprod.com/jgloss/packratting.html
> 
> 3. You need a tool to figure out what is happening, letting you
> monitor how many objects there are of various types. see
> http://mindprod.com/jgloss/profiler.html

Useful standard tools for memory woes:

http://docs.oracle.com/javase/7/docs/technotes/tools/index.html#monitor
http://docs.oracle.com/javase/7/docs/technotes/tools/share/jstat.html
http://docs.oracle.com/javase/7/docs/technotes/tools/share/jhat.html

-- 
Lew

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#18840

It appears that the response was very large and GWT code doesn't support 
streaming.

In article <k305t6$n8o$1@news.m-online.net>,
 Magnus Warker <magnux@mailinator.com> wrote:

> Hi,
> 
> below is an exception found in my tomcat log. It's a GWT app.
> 
> What is going on there?
> 
> Magnus
> 
> -----
> Sep 14, 2012 10:58:14 PM org.apache.catalina.core.ApplicationContext log
> SEVERE: Exception while dispatching incoming RPC call
> java.lang.OutOfMemoryError: Java heap space
>          at java.util.Arrays.copyOf(Arrays.java:2760)
>          at java.util.Arrays.copyOf(Arrays.java:2734)
>          at java.util.ArrayList.ensureCapacity(ArrayList.java:167)
>          at java.util.ArrayList.add(ArrayList.java:351)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.append(Ser
> verSerializationStreamWriter.java:583)
>          at 
> com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeInt
> (AbstractSerializationStreamWriter.java:100)
>          at 
> com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObj
> ect(AbstractSerializationStreamWriter.java:116)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWrite
> r$8.write(ServerSerializationStreamWriter.java:153)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeV
> alue(ServerSerializationStreamWriter.java:539)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeC
> lass(ServerSerializationStreamWriter.java:709)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeI
> mpl(ServerSerializationStreamWriter.java:748)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(
> ServerSerializationStreamWriter.java:621)
>          at 
> com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObj
> ect(AbstractSerializationStreamWriter.java:126)
>          at 
> com.google.gwt.user.client.rpc.core.java.util.Collection_CustomFieldSerializer
> Base.serialize(Collection_CustomFieldSerializerBase.java:44)
>          at 
> com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.
> serialize(ArrayList_CustomFieldSerializer.java:39)
>          at 
> com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.
> serializeInstance(ArrayList_CustomFieldSerializer.java:51)
>          at 
> com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.
> serializeInstance(ArrayList_CustomFieldSerializer.java:28)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeI
> mpl(ServerSerializationStreamWriter.java:740)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(
> ServerSerializationStreamWriter.java:621)
>          at 
> com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObj
> ect(AbstractSerializationStreamWriter.java:126)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWrite
> r$8.write(ServerSerializationStreamWriter.java:153)
>          at 
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeV
> alue(ServerSerializationStreamWriter.java:539)
>          at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:616)
>          at 
> com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess(RPC.java:474)
>          at 
> com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:571)
>          at 
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceS
> ervlet.java:208)
>          at 
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceS
> ervlet.java:248)
>          at 
> com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRem
> oteServiceServlet.java:62)
>          at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>          at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>          at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFi
> lterChain.java:290)
>          at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChai
> n.java:206)
-- 
I will not see posts from Google because I must filter them as spam

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