java.lang.OutOfMemoryError: Java heap space

nanohazard · Post by **nanohazard** » 15 Feb 2011, 08:21

Hi,

would like to know what's wrong with this?

 [ WARNING ] [id: 81] (SmartFoxServer.readIncomingMessages): Generic Exception: java.lang.OutOfMemoryError: Java heap space

Thanks

BigFIsh · Post by **BigFIsh** » 15 Feb 2011, 18:06

It may be that your server ran out of its associated java virtual memory (JVM).

See http://www.smartfoxserver.com/docs/docP ... nced.htm#6. What parameters did you use (for min/max)?

Also, have you checked memory usage with the admin tool that came with the server? It will indicate how much you have left, and what the maximum value is.

nanohazard · Post by **nanohazard** » 16 Feb 2011, 14:44

thanks.

I edit also the wrapper.conf in the conf folder.

so far no OutOfMemoryError.

diridam · Post by **diridam** » 24 Feb 2011, 09:44

Regarding the outOfMemory

I am encountering the folowing problem once every 2 days (concurent connections ~300).

INFO | jvm 1 | 2011/02/24 11:54:28 | Exception in thread "selector" java.lang.OutOfMemoryError
INFO | jvm 1 | 2011/02/24 11:54:28 | at sun.misc.Unsafe.allocateMemory(Native Method)
INFO | jvm 1 | 2011/02/24 11:54:28 | at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:99)
INFO | jvm 1 | 2011/02/24 11:54:28 | at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:288)
INFO | jvm 1 | 2011/02/24 11:54:28 | at it.gotoandplay.smartfoxserver.util.Attachment.<init>(Attachment.java:33)
INFO | jvm 1 | 2011/02/24 11:54:28 | at it.gotoandplay.smartfoxserver.SmartFoxServer.checkNewConnections(SmartFoxServer.java:1317)
INFO | jvm 1 | 2011/02/24 11:54:28 | at it.gotoandplay.smartfoxserver.EventReader.run(EventReader.java:31)
INFO | jvm 1 | 2011/02/24 11:54:28 | at java.lang.Thread.run(Thread.java:619)

The wrapper.conf settings are:
# Java Additional Parameters
wrapper.java.additional.1=-server
wrapper.java.additional.2=-Dfile.encoding=UTF-8
wrapper.java.additional.3=-Djava.util.logging.config.file=logging.properties
wrapper.java.additional.3=-Xms1024M
wrapper.java.additional.4=-Xmx2048M

is there something else should i change in the configs to stop the server runing into outofmemory ?

BigFIsh · Post by **BigFIsh** » 24 Feb 2011, 20:35

It's a very complex issue, and I don't really know for sure what could be the root of the problem.

I would suggest looking on google regarding the java.lang.OutOfMemoryError. Here's something I found: http://www.myhomepageindia.com/index.ph ... error.html

This have been discussed before too. Use the forum's search tool.

If this was occurring once every two days, I wouldn't worry too much about it until it starts occurring more often. If the occurrence increases over time, there could be a possible memory leak somewhere.