Re: SIGSEGV (segmentation fault) error occurred during init a JDOM element
Rolf Lear <[email protected]> Mon, 25 Feb 2013 20:25:45 -0500
| Newsgroups | gmane.comp.java.jdom.general |
|---|---|
| Message-ID | <[email protected]> |
This is a multi-part message in MIME format. --===============2124416818== Content-Type: multipart/alternative; boundary="------------090500080009030804080606" This is a multi-part message in MIME format. --------------090500080009030804080606 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Krish. This problem is almost certainly not related directly to JDOM. PermGen space is typically very small, and only used for two common purposes: - storing class definitions - storing String constants For your interest, the most common causes of PermGen Exhaustion that I know of are: - using Tomcat and loading/unloading servlets - each 'classloader' has it's own space in PermGen, and since each servlet has it's own classloader the PermGen fills up fast because so many classes are duplicated in different places in PermGen - Using lots of String.intern() calls - String.intern() uses a String constant reference from PermGen (or creates one if there was not one already). If you have many calls to String.intern() it can fill up PermGen very fast. JDOM does not do String.intern() Rolf On 25/02/2013 1:30 AM, Krishnendu Roy Chowdhury wrote: > > HI! > > I have faced a problem related to segmentation fault in Linux box. I > got following error - > > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< > J org.jdom.Element.<init>(Ljava/lang/String;)V > ... > siginfo:si_signo=SIGSEGV: si_errno=0, si_code=2 (SEGV_ACCERR), > si_addr=0x00002aab2ac30000 > > .................................... > > error occurred during error reporting (printing native stack), id 0xb > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< > > It is also shows in the log that 100% use of PermGen space. Why this > segmentation fault occurred? Is it related to JDK or JDOM? > > In my understanding, problem is related to JDK and occurred due to > 100% use of PermGen space. But I am not sure as Problematic frame is J. > > Another interesting point is "error occurred during error reporting > (printing native stack), id 0xb". > > I am using JDK6up20 and Linux environment. Please find attached logs > for details. > > Please help me. > > > Regards, > Krish > > > > _______________________________________________ > To control your jdom-interest membership: > http://www.jdom.org/mailman/options/jdom-interest/[email protected] --------------090500080009030804080606 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#FFFFFF"> <div class="moz-cite-prefix">Hi Krish.<br> <br> This problem is almost certainly not related directly to JDOM. PermGen space is typically very small, and only used for two common purposes:<br> - storing class definitions<br> - storing String constants<br> <br> For your interest, the most common causes of PermGen Exhaustion that I know of are:<br> <br> - using Tomcat and loading/unloading servlets - each 'classloader' has it's own space in PermGen, and since each servlet has it's own classloader the PermGen fills up fast because so many classes are duplicated in different places in PermGen<br> - Using lots of String.intern() calls - String.intern() uses a String constant reference from PermGen (or creates one if there was not one already). If you have many calls to String.intern() it can fill up PermGen very fast. JDOM does not do String.intern()<br> <br> Rolf<br> <br> On 25/02/2013 1:30 AM, Krishnendu Roy Chowdhury wrote:<br> </div> <blockquote cite="mid:[email protected]" type="cite"> <table border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="font: inherit;" valign="top"> <p class="yiv1670231864MsoNormal"><font size="3" face="Times New Roman"><span style="FONT-SIZE:12pt;">HI! <br> <br> I have faced a problem related to segmentation fault in Linux box. I got following error -<br> <br> </span></font></p> <p class="yiv1670231864MsoNormal"><font size="3" face="Times New Roman"><span style="FONT-SIZE:12pt;"><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<br> J org.jdom.Element.<init>(Ljava/lang/String;)V<br> ...<br> siginfo:si_signo=SIGSEGV: si_errno=0, si_code=2 (SEGV_ACCERR), si_addr=0x00002aab2ac30000</span></font></p> <p class="yiv1670231864MsoNormal"><font size="3" face="Times New Roman"><span style="FONT-SIZE:12pt;">....................................</span></font></p> <p class="yiv1670231864MsoNormal"><font size="3" face="Times New Roman"><span style="FONT-SIZE:12pt;">error occurred during error reporting (printing native stack), id 0xb<br> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< <br> <br> It is also shows in the log that 100% use of PermGen space. Why this segmentation fault occurred? Is it related to JDK or JDOM?<br> <br> In my understanding, problem is related to JDK and occurred due to 100% use of PermGen space. But I am not sure as Problematic frame is J. <br> <br> Another interesting point is "error occurred during error reporting (printing native stack), id 0xb".<br> <br> I am using JDK6up20 and Linux environment. Please find attached logs for details.</span></font></p> <p class="yiv1670231864MsoNormal"><font size="3" face="Times New Roman"><span style="FONT-SIZE:12pt;"> </span></font></p> <p class="yiv1670231864MsoNormal"><font size="3" face="Times New Roman"><span style="FONT-SIZE:12pt;">Please help me. </span></font></p> <font size="3" face="Times New Roman"><span style="FONT-SIZE:12pt;"><br> Regards,<br> Krish</span></font></td> </tr> </tbody> </table> <br> <fieldset class="mimeAttachmentHeader"></fieldset> <br> <pre wrap="">_______________________________________________ To control your jdom-interest membership: <a class="moz-txt-link-freetext" href="http://www.jdom.org/mailman/options/jdom-interest/[email protected]">http://www.jdom.org/mailman/options/jdom-interest/[email protected]</a></pre> </blockquote> <br> </body> </html> --------------090500080009030804080606-- --===============2124416818== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ To control your jdom-interest membership: http://www.jdom.org/mailman/options/jdom-interest/[email protected] --===============2124416818==--