Re: Tomcat on Power I
On Mon, Mar 19, 2018 at 05:39:35PM +0100, Rainer Jung wrote: > Am 19.03.2018 um 14:24 schrieb Christopher Schultz: > > -BEGIN PGP SIGNED MESSAGE- > > Hash: SHA256 > > > > Danny, > > > > On 3/19/18 5:42 AM, Danny Rodius wrote: > > > has anyone tried tomcat on Power i systems? > > > > Which OS? > > Probably the OP means System i, aka iSeries, aka AS/400. > > > There is at least one guy here who uses Tomcat on AS/400, but I think > > he has had better luck with a *NIX OS on the same hardware. I'm not > > precisely sure how all that works. > > > > Theoretically, if there is a Java Virtual Machine for the > > OS/architecture, then Tomcat should run on it. > > Regards, > > Rainer IBM Power systems come in a variety of flavors. The iSeries boxes do run i5OS (Formerly OS/400), and they ship with an AIX subsystem which provides unix functionality. IBM also supplies packages for the JVM that can be installed, and Tomcat runs fine in those environments. We are running the latest 8.0 point release on our dev servers. I can't comment on any potential issues with newer releases yet. If you have a machine with a PowerLinux partition, then it's Linux, and you should have no difficulties there. -Greg -- Greg Vilardi |Technical Lead E-mail:vila...@panix.com USnail: 354 Indian Head Rd |Vormittag Associates, Inc. Home:(631)864-1310 Commack, NY 11725 |Ronkonkoma, NY 11779 Cell:(631)627-1448 .sig Version 0.71 I thought, I wrote, I posted. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: tomcat cache wierd behaviour
You probably need to update your JVM. There is a bug in the internal time handling of the new DST rules here in the USA (at least). THe latest Java 5 and Java 6 JVM from Sun have fixed this. I know that the issue exists in the build 1.6.0-b105 Sun JVM, and I think that 1.5.0_14- b103 also exhibits the issue, but I can't down our main development server right now to confirm that. We are not experiencing the symptoms that you are describing, but we are seeiong that all of our logging is off by an hour as a result. It's certainly worth checking in any case. Regards, -Greg On 8 Apr 2008 at 7:37, loredana loredana wrote: winscp is a tool...like windows commander or total commander, . is just to view the files in an organized matter. :) i'm sure the problem is not winscp :) - Original Message From: Hassan Schroeder [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Tuesday, April 8, 2008 5:33:44 PM Subject: Re: tomcat cache wierd behaviour On Tue, Apr 8, 2008 at 7:12 AM, loredana loredana [EMAIL PROTECTED] wrote: I run a date command on the server (which is ubuntu) and got Tue Apr 8 15:50:01 CEST 2008 Using winscp, I see ... So it sounds like your problem is with winscp, whatever that is, not Tomcat :-)Maybe this is a question for the winscp user list? -- Hassan Schroeder [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] __ __ You rock. That's why Blockbuster's offering you one month of Blockbuster Total Access, No Cost. http://tc.deals.yahoo.com/tc/blockbuster/text5.com - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Gregory H. Vilardi631-752-2701x240 [EMAIL PROTECTED] Project Manager / Lead Software Engineer Recurrent Software Solutions, a division of PES Payroll 1 Huntington Quadrangle, Suite 1C02, Melville, NY 11747 Fax: 631-752-3397 http://www.recurrentsoft.com - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: What do I do with a heap dump? (OOM Permgen)
On 2 Nov 2007 at 7:24, Caldarale, Charles R wrote: From: Peter Crowther [mailto:[EMAIL PROTECTED] Subject: RE: What do I do with a heap dump? (OOM Permgen) As far as I know, public enemy #1 for eating PermGen space is still developers using the Singleton pattern in their code and not having listeners to null out the singleton instance when the webapp is undeployed. Analagous use of ThreadLocal is also a subtle contributor to the problem. The offending references must be cleared at the end of processing of each request, since listeners don't have ready access to the thread pool. Thank you for the pointers Peter. We do not have any Singletons in the application nor do we use ThreadLocal. However, we do not seem to be cleaning up the JDBC classes on redeploy. I'll install the SessionListener code that is mentionned in the references in Peter's reply. I'm also using the eval version of yourkit now to see what exactly is attached to each of the 52 WebAppClassLoaders in the dump. I'll be back if I get stuck again further down the road. Thank you to all of the people who replied for the pointers and the tool recommendations. -Greg -- Gregory H. Vilardi631-752-2701x240 [EMAIL PROTECTED] Project Manager / Lead Software Engineer Fax: (631)752-3397 Recurrent Software Solutions, Inc. http://www.recurrentsoft.com 1 Huntington Quadrangle, Suite 1C02, Melville, NY 11747 - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: What do I do with a heap dump? (OOM Permgen)
On 1 Nov 2007 at 18:32, Gabe Wong wrote: Greg Vilardi wrote: Hello everyone. My team and I are trying to develop a new web application and the tomcat JVM is crashing every few days. We are deploying our separate versions of the application several times per hour, and by looking at Please elaborate, are you undeploying the same application, then redeploying several times per hour, are are you deploying several instances of the same application per hour. I am also assuming these are hot deploys (without shutting down the app server)? Each of us uses our own sandbox directory that is linked into the tomcat/webapps directory. We use make for our build management, and run 'make install' to copy the JSPs and jar files into the webapp directory. Since Tomcat is set to dynamically look for new files, we don't actually ever undeploy the application directly. Each developer rebuilds their web application several times per hour into their own sandbox. You assume correctly that weare not shutting down tomcat as part of each deployment. Thanks, -Greg -- Gregory H. Vilardi631-752-2701x240 [EMAIL PROTECTED] Project Manager / Lead Software Engineer Fax: (631)752-3397 Recurrent Software Solutions, Inc. http://www.recurrentsoft.com 1 Huntington Quadrangle, Suite 1C02, Melville, NY 11747 - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
What do I do with a heap dump? (OOM Permgen)
Hello everyone. My team and I are trying to develop a new web application and the tomcat JVM is crashing every few days. We are deploying our separate versions of the application several times per hour, and by looking at jprobe, I see that each deployment of a webapp consumes 440kb of PermGen space. This space does not seem to be released, although I've only been monitoring this for 4 hours now. I have a heap dump from the last crash, (courtesy of +XXHeapDumpOnOutOfMemoryError) and have taken two memory dumps using jmap before and after a redeploy on an otherwise quiescent JVM. Now, having done this, I've also looked at the dumps using jhat. There seems to be a vast amount of data there, but I can't distill the information I need out of it. I apologize if my Google-Fu is weak, but I didn't find much real information on interpreting jhat data. Preliminary examination of the jhat data does not show much of my application or helper classes (mysql, jdbc). So, my questions are: How do I figure out what is in that 440kb per deployment? Is there an FM for me to R on how to interpret jhat data? What should I be looking for? How do I break this problem down further? The environment is: OS: Debian etch 2.6.21 kernel JVM: Sun Java 6 1.6.0-b105 Configured for use with jprobe and default memory allocations. (This was done to try to make the problem easier to reproduce/study.) Tomcat: 6.0.14 fronted via Apache 2.2.4 using mod_proxy_ajp. Database: MySQL 5.0.32 using the latest ConnectorJ. The application is a combination of JSP and servlets with some AJAX but no Comet, Hibernate, c. Apache and Tomcat were hand installed (not from Debian packages). Any help that you can provide would be greatly appreciated. -Greg -- Gregory H. Vilardi631-752-2701x240 [EMAIL PROTECTED] Project Manager / Lead Software Engineer Fax: (631)752-3397 Recurrent Software Solutions, Inc. http://www.recurrentsoft.com 1 Huntington Quadrangle, Suite 1C02, Melville, NY 11747 - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
JSTL and Tomcat 6.0.10 ConditionalTagSupport class missing?
I have a problem porting one of my webapps from 5.0.28 to 6.0.10. I've reduced the problem to the testcase in this message. Briefly, the following test case produces the exception shown below it. The class referenced in the error does appear in the old JSTL jar that we are using. However it is absent in the tomcat jars, and does not appear in the 1.6.0 JDK, either. Can anyone tell me what I'm missing or should be doing to make this work? Thanks, -Greg Example jsp: !DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.0 Transitional//EN html head %@ page buffer=50kb language=java % %@ taglib prefix=c uri=http://java.sun.com/jsp/jstl/core; % % boolean b = true; % /head body c:choose c:when test=%=b% TRUE /c:when c:otherwise FALSE /c:otherwise /c:choose /body /html Exception: java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/ConditionalTagSupport Exception Type:class java.lang.NoClassDefFoundError Status Code:500 URI:/ghvp/a.jsp Request URI:/ghvp/errmsg Exception: java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/ConditionalTagSupport Message: javax/servlet/jsp/jstl/core/ConditionalTagSupport Stack Trace: java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/ConditionalTagSupport at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader .java:1815) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:87 2) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:13 25) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:12 04) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader .java:1815) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:87 2) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:13 25) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:12 04) at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1221) at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1449) at org.apache.jasper.compiler.Parser.parseBody(Parser.java:1657) at org.apache.jasper.compiler.Parser.parseOptionalBody(Parser.java:1004) at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1272) at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1449) at org.apache.jasper.compiler.Parser.parse(Parser.java:133) at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:215) at org.apache.jasper.compiler.ParserController.parse(ParserController.java:102) at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:167) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:306) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:286) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:273) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:308) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilt erChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain. java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:2 28) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:1 75) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.jav a:525) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109 ) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216) at
Can the manager app drop sessions on a start?
I'm running Tomcat 5.0.28 on Linux, for a development platform. After updating an application, Tomcat (or possibly the manager app) can't start the application if it has sessions pending. One of my co-workers thinks that this is a session serialization issue, in that our application keeps lots of non- serialized objects in the session. (Yes, I know that this is not optimal, but it is within our operational parameters for reliability.) I can restart the application by undeploying it and then redeploying the directory. If the session serialization hypothesis is correct, I'd like to be able to have the ability to tell manager to ignore these sessions and just start the application. I don't think that the manager has this capability anywhere, since I did RTFM, but I'd be delighted to be told that I'm wrong, or if I'm right, I'd love to hear some thoughts on how I'd be able to code this myself. I don't have thorough enough knowledge of Tomcat's innards to have any idea of where to begin my research. Thanks, -Greg -- Gregory H. Vilardi631-752-2701x240 [EMAIL PROTECTED] Project Manager / Lead Software Engineer Fax: (631)752-3397 Recurrent Software Solutions, Inc. http://www.recurrentsoft.com 1 Huntington Quadrangle, Suite 1C02, Melville, NY 11747 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
