AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  JDK 1.4.2_05          AppletTalk.com Forum Index -> JVM, native methods and hardware View previous topic :: View next topic   Author Message Kevin Guest Posted: Thu Jan 25, 2007 10:04 pm    Post subject: JDK 1.4.2_05 I use WebLogic 8.1 on a Solaris 9 box with 8 processors. I have JDK 1.4.2_05 installed and due to long pauses with the default collector, I tried out the Concurrent garbage collector. However, once I do that, the system runs out of file handles within minutes of starting the load test. Solaris is setup with 8192 as the top limit for file handles. I tried various options within Concurrent garbage collector (like ParNewGC, CMSParallelRemark) but all lead to system running out of file handles. Any inputs ? Thanks, Kevin. Back to top Mike Amling Guest Posted: Thu Jan 25, 2007 10:21 pm    Post subject: Re: JDK 1.4.2_05 Kevin wrote: Quote: I use WebLogic 8.1 on a Solaris 9 box with 8 processors. I have JDK 1.4.2_05 installed and due to long pauses with the default collector, I tried out the Concurrent garbage collector. However, once I do that, the system runs out of file handles within minutes of starting the load test. Solaris is setup with 8192 as the top limit for file handles. I tried various options within Concurrent garbage collector (like ParNewGC, CMSParallelRemark) but all lead to system running out of file handles. Does your load test construct a lot of FileInputStream etc objects without closing them? Do you depend on finalizers running to close them? --Mike Amling Back to top Gordon Beaton Guest Posted: Thu Jan 25, 2007 11:04 pm    Post subject: Re: JDK 1.4.2_05 On 25 Jan 2007 08:04:39 -0800, Kevin wrote: Quote: I use WebLogic 8.1 on a Solaris 9 box with 8 processors. I have JDK 1.4.2_05 installed and due to long pauses with the default collector, I tried out the Concurrent garbage collector. However, once I do that, the system runs out of file handles within minutes of starting the load test. Solaris is setup with 8192 as the top limit for file handles. Use ulimit to raise (or check) the per-process descriptor limit. However realize too that lack of file descriptors does not trigger the garbage collector. Running out of descriptors is symptomatic of a problem in the application. /gordon -- [ don't email me support questions or followups ] g o r d o n + n e w s @ b a l d e r 1 3 . s e Back to top Kevin Guest Posted: Fri Jan 26, 2007 12:47 am    Post subject: Re: JDK 1.4.2_05 Thanks for the reply Gordon - I should have mentioned this earlier - the application is running fine (for the past two years) with the default jvm settings and ulimit of 8192. In an effort tweak the jvm (reduce the long pauses) I decided to use different collectors. ParallelGC worked fine, UseParNew worked fine, but the moment I switched to Concurrent, it started throwing error about file handles. Kevin. Back to top mickey Guest Posted: Mon Feb 19, 2007 9:16 pm    Post subject: Re: JDK 1.4.2_05 On Jan 25, 9:04 pm, "Kevin" <kejos...@hotmail.com> wrote: Quote: I use WebLogic 8.1 on a Solaris 9 box with 8 processors. I have JDK 1.4.2_05 installed and due to long pauses with the default collector, I tried out the Concurrent garbage collector. However, once I do that, the system runs out of file handles within minutes of starting the load test. Solaris is setup with 8192 as the top limit for file handles. I tried various options within Concurrent garbage collector (like ParNewGC, CMSParallelRemark) but all lead to system running out of file handles. Any inputs ? Thanks, Kevin. hi.. im a junior programmer in java ...i've problem in starting with JDBC ..JSP , EJB,STRUTS n hibernate >> can u plzz tell me hw to get start with it .. any book u can suggest me even i'd tried using GRIDBAG LAYOUT in swings but its difficult to get hold of it.. hw about websphere and weblogic.. CAn u suggest me any link from where i can get VIDEO TUTORIALS regarding this.. 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