Skip to main content

Out of Memory: Killed process


This is a simple symptom-cause-solution blog entry only. I hope these blogs will help fellow administrators.

Symptom

On Red Hat Enterprise Linux 4 (and possibly other flavours and versions) all weblogic processes are disappearing and there are no errors in the server logs. Upon closer inspection the processes are being killed by the OS. The Linux "dmesg" command shows log messages like:

Out of Memory: Killed process 22043

Cause

The processes are using up too much low- (under 640k) or high-memory and the Linux OOM-Killer is killing the processes.

Solution

Either disable OOM-killer, or make it work more aggresively.

To disable, run this command:

echo "0" > /proc/sys/vm/oom-kill

To make more aggressive:

echo "250" > /proc/sys/vm/lower_zone_protection

References

http://en.wikipedia.org/wiki/Out_of_memory
http://www.linux-archive.org/red-hat-linux/39907-out-memory-issue.html

Comments

Popular posts from this blog

NullPointerException

java.lang.NullPointerException NullPointerException is described in the javadoc comments as: Thrown when an application attempts to use null in a case where an object is required. These include: Calling the instance method of a null object. Accessing or modifying the field of a null object. Taking the length of null as if it were an array. Accessing or modifying the slots of null as if it were an array. Throwing null as if it were a Throwable value. Applications should throw instances of this class to indicate other illegal uses of the null object. author: unascribed version: 1.19, 12/19/03 since: JDK1.0 Where is this exception thrown? Following, is a list of exception messages cross-referenced to the source code responsible for throwing them. Click on the method link to view the code and see how the exception is thrown. The message ' java.lang.NullPointerException: ' is thrown within the method: com.sun.corba.se.impl.interceptors.ClientRequestInfoImpl.get_r

Connection refused: No available router to destination

This is a simple symptom-cause-solution blog entry only. I hope these blogs will help fellow administrators. Symptom The following exception occurs in WebLogic server logs. Most likely to occur during WebLogic server start-up, but similar exceptions may occur at other times. java.net.ConnectException: t3://myserver:8000: Destination unreachable; nested exception is: java.net.ConnectException: Connection refused: connect; No available router to destination] at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:49) at weblogic.jndi.WLInitialContextFactoryDelegate.toNamingException(WLInitialContextFactoryDelegate.java:773) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:363) at weblogic.jndi.Environment.getContext(Environment.java:307) at weblogic.jndi.Environment.getContext(Environment.java:277) Cause This message (Connection refused: connect; No available

SocketException

java.net.SocketException SocketException is described in the javadoc comments as: Thrown to indicate that there is an error in the underlying protocol, such as a TCP error. author: Jonathan Payne version: 1.17, 12/19/03 since: JDK1.0 Where is this exception thrown? Following, is a list of exception messages cross-referenced to the source code responsible for throwing them. Click on the method link to view the code and see how the exception is thrown. The message ' java.net.SocketException: ... ' is thrown within the method: java.net.ServerSocket.createImpl() The message ' java.net.SocketException: ... ' is thrown within the method: java.net.Socket.createImpl(boolean) The message ' java.net.SocketException: ... ' is thrown within the method: java.net.SocksSocketImpl.connect(SocketAddress, int) The message ' java.net.SocketException: ... ' is thrown within the method: java.net.SocksSocketImpl.socksBind(InetSocketAddress) The message