I think you do have the Native library, but since you're getting OutOfMemoryError the garbage collector is unable to free additional memory for further work, and this is why the application hangs.
This article http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_17470 explains it well. One suggestion made in the above aritcle would be to gradually increase the memory, by trial and error until you don't get the OutOfMemoryError, since the memory setting you have right now is not working out. -Rashmi ----- Original Message ---- From: Rahul Tandon <[EMAIL PROTECTED]> To: Tomcat Users List <users@tomcat.apache.org> Sent: Thursday, March 15, 2007 11:08:29 AM Subject: RE: tomcat 5.5 Thanks Rashmi for the suggestion. My application is using (some time) quite a big memory (I need 1GB once in a while!!!), that's why I wanted to have this setting. One other thing I notice(which I am not sure of), will this error would have any effect: The Apache Tomcat Native library which allows optimal performance in production environments was not found Thanks again. Rahul Tandon 516-627-8993 Xtn 208 [EMAIL PROTECTED] 111 Great Neck Rd.,Suite #314 Great Neck, NY 11021 This communication is for informational purposes only. The contents of this transmission are confidential and are intended solely for the use of the individual or entity to whom they are addressed.If you have received this email in error please notify the sender by return email and delete this message from your system. Flextrade Systems Inc., its subsidiaries and affiliates do not guarantee the completeness and accuracy of this transmission's contents. Moreover, Flextrade Systems Inc., its subsidiaries and affiliates do not guarantee this communication to be free of viruses and accept no liability for any damage caused thereof. -----Original Message----- From: Rashmi Rubdi [mailto:[EMAIL PROTECTED] Sent: Thursday, March 15, 2007 10:59 AM To: Tomcat Users List Subject: Re: tomcat 5.5 I think trying to increase the memory configuration in any application doesn't necessarily contribute to it's speed because the garbage collector does not perform serious attempts to release memory until the heap size limit is reached. So, having a lower heap size limit (lower max memory setting), ensures that the garbage collector releases as much memory as possible in a shorter interval and having a higher memory setting significantly delays the garbage collection. My suggestion is that it is better to keep the original memory settings than increase it, and only increase it if your project is too large or resource intensive and requires additional memory and not because there's plenty of memory available - why not use it. -Rashmi ----- Original Message ---- From: Rahul Tandon <[EMAIL PROTECTED]> To: Tomcat Users List <users@tomcat.apache.org> Sent: Thursday, March 15, 2007 10:25:22 AM Subject: tomcat 5.5 Hi, I had posted this yesterday and got some feedback from chuck, but still there is no concrete resolution to the problem, if somebody knows anything about this kind of issue, please help me. I am using following configuration: Red Hat Enterprise Linux AS release 3 (Taroon Update 4) 4GB RAM Tomcat version 5.5 Java version "1.5.0_06" Tomcat connectors setting: maxThreads="150" minSpareThreads="25" maxSpareThreads="75" ulimit -a also seems ok: core file size (blocks, -c) unlimited data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited max locked memory (kbytes, -l) 4 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 7168 virtual memory (kbytes, -v) unlimited . I am using CATALINA_OPTS "-Xms512m -Xmx512m -Djava.awt.headless=true" and tomcat comes up fine and my http requests are processed normal. If I change memory setting to 1024m (-Xmx1024m -Xms512m) then I am getting this error: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39 ) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl .java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:275) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413) Caused by: java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:574) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.<init>(ThreadPool. java:643) at org.apache.tomcat.util.threads.ThreadPool.openThreads(ThreadPool.java:515) at org.apache.tomcat.util.threads.ThreadPool.start(ThreadPool.java:148) at org.apache.tomcat.util.net.PoolTcpEndpoint.startEndpoint(PoolTcpEndpoint.jav a:315) at org.apache.coyote.http11.Http11BaseProtocol.start(Http11BaseProtocol.java:15 0) at org.apache.coyote.http11.Http11Protocol.start(Http11Protocol.java:75) at org.apache.catalina.connector.Connector.start(Connector.java:1089) at org.apache.catalina.core.StandardService.start(StandardService.java:459) at org.apache.catalina.core.StandardServer.start(StandardServer.java:709) at org.apache.catalina.startup.Catalina.start(Catalina.java:551) ... 6 more And tomcat hangs and does not respond to http requests. I am checking vmstat at this time and see 3GB free memory. I would appreciate any help. Thanks, Rahul Tandon ____________________________________________________________________________ ________ No need to miss a message. Get email on-the-go with Yahoo! Mail for Mobile. Get started. http://mobile.yahoo.com/mail --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] ____________________________________________________________________________________ Don't pick lemons. See all the new 2007 cars at Yahoo! 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