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85   <li>Looked into JVM stack and heap sizes on dfls83-85</li>
86 </ul>
87                   <p>As you know there have been service interruptions in CQWeb. I keep looking at the logs for clues. About the only consistent thing is an error similar to this:</p>
88
89 <div class=code><pre>
90 2006-09-28 00:10:20 Ajp13Processor[8009][15] process: invoke
91 java.net.SocketException: Connection reset by peer: socket write error
92         at java.net.SocketOutputStream.socketWrite0(Native Method)
93         at java.net.SocketOutputStream.socketWrite(Unknown Source)
94         at java.net.SocketOutputStream.write(Unknown Source)
95         at org.apache.ajp.Ajp13.send(Ajp13.java:525)
96         at org.apache.ajp.RequestHandler.finish(RequestHandler.java:495)
97         at org.apache.ajp.Ajp13.finish(Ajp13.java:395)
98         at org.apache.ajp.tomcat4.Ajp13Response.finishResponse(Ajp13Response.java:196)
99         at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:464)
100         at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:551)
101         at java.lang.Thread.run(Unknown Source)
102 </pre></div>
103
104 <p>Now "Connection reset by peer" could be an error that the process gets because the service has stopped so this could be more of a symptom than a cure. However searching for "Ajp13Processor socket write error" points me to <a href="http://mail-archives.apache.org/mod_mbox/tomcat-users/200203.mbox/%3C751828609.20020327090907@e-box.dk%3E">this
105 post</a> which suggests increasing the stack and heap sizes for the JVM. Problems that are intermittent can be consistent with running out of stack or heap size.<./p>
106
107 <p>According to the Clearquest Web Administration Guide:</p>
108
109 <blockquote>
110   <hr size="2" width="100%">
111   <h3>Controlling Java VM Memory Consumption </h3>
112
113   <p>You can configure the memory consumption of Java processes used by New ClearQuest Web by adjusting the parameters in property files under the various components.</p>
114
115   <h4>Windows </h4>
116
117   <p>This section describes the configuration changes for New ClearQuest Web Java VM memory consumption for processes running on Microsoft Windows. To specify the VM memory consumption:</p>
118
119   <ol>
120     <li>Open the appropriate configuration file for the New ClearQuest Web component whose memory consumption you want to reconfigure. For the ClearQuest Web application:
121
122       <table border="1" cellpadding="2" cellspacing="0" width="100%">
123         <tbody>
124           <tr>
125             <th align="left" valign="top">Component</th>
126             <th align="left" valign="top">Configuration file</th>
127           </tr>
128           <tr>
129             <td valign="top">Apache Tomcat Server</td>
130             <td valign="top">C:\Program
131 Files\Rational\Common\rwp\bin\jk_service2.in.properties</td>
132           </tr>
133           <tr>
134             <td valign="top">Rational Web Platform</td>
135             <td valign="top">C:\Program
136 Files\Rational\Common\rwp\bin\jk_service2.properties</td>
137           </tr>
138         </tbody>
139       </table>
140       <br>
141     <p>For the ClearQuest server:</p>
142       <table border="1" cellpadding="2" cellspacing="0" width="100%">
143         <tbody>
144           <tr>
145             <th align="left" valign="top">Component</th>
146             <th align="left" valign="top">Configuration file</th>
147           </tr>
148           <tr>
149             <td valign="top">ClearQuest Request Manager</td>
150             <td valign="top">C:\Program
151 Files\Rational\ClearQuest\cqweb\cqserver\requestmgr_service.properties</td>
152           </tr>
153           <tr>
154             <td valign="top">ClearQuest Registry Server</td>
155             <td valign="top">C:\Program
156 Files\Rational\ClearQuest\cqweb\cqregsvr\cqregsvr_service.properties</td>
157           </tr>
158         </tbody>
159       </table>
160     </li>
161     <li>Modify the section shown below:<br>
162       <br>
163     <div class=code><pre>
164 # # JVM Options #
165 # Useful Options:
166 # -Xms2m = Initial heap size, modify for desired size
167 # -Xmx256m = Maximum heap size, modify for desired size
168 # -Xrs = Available in Jdk1.3.1 to avoid JVM termination during logoff
169 #
170 wrapper.jvm.options=-Xrs -Xms2m -Xmx256m
171     </pre></div></li>
172   </ol>
173   <hr size="2" width="100%">
174 </blockquote>
175
176 <p>I looked at these config files on the three machines (dfls83-85) and they were pretty much set to the default:</p>
177
178 <div class=code><pre>
179 <font color=blue><b>Ltx0062320:</b></font><u>for server in 83 84 85; do grep
180 wrapper.jvm.options= //dfls$server/Rational/Common/rwp/bin/jk_service2*properties
181 //dfls$server/Rational/ClearQuest/cqweb/cqserver/requestmgr_service.properties
182 //dfls
183 $server/Rational/ClearQuest/cqweb/cqregsvr/cqregsvr_service.properties;
184 done</u>
185 //dfls83/Rational/Common/rwp/bin/jk_service2.default.properties:wrapper.jvm.options=-Xrs
186 -Xms2m -Xmx256m<br>
187 //dfls83/Rational/Common/rwp/bin/jk_service2.in.properties:wrapper.jvm.options=-Xrs
188 -Xms2m -Xmx256m<br>
189 //dfls83/Rational/Common/rwp/bin/jk_service2.properties:wrapper.jvm.options=-Xrs
190 -Xms2m -Xmx256m<br>
191 //dfls83/Rational/ClearQuest/cqweb/cqserver/requestmgr_service.properties:wrapper.jvm.options=-Xrs<br>
192 //dfls83/Rational/ClearQuest/cqweb/cqregsvr/cqregsvr_service.properties:wrapper.jvm.options=-Xrs<br>
193 //dfls84/Rational/Common/rwp/bin/jk_service2.default.properties:wrapper.jvm.options=-Xrs
194 -Xms2m -Xmx256m<br>
195 //dfls84/Rational/Common/rwp/bin/jk_service2.in.properties:wrapper.jvm.options=-Xrs
196 -Xms2m -Xmx256m<br>
197 //dfls84/Rational/Common/rwp/bin/jk_service2.properties:wrapper.jvm.options=-Xrs
198 -Xms2m -Xmx256m<br>
199 //dfls84/Rational/ClearQuest/cqweb/cqserver/requestmgr_service.properties:wrapper.jvm.options=-Xrs<br>
200 //dfls84/Rational/ClearQuest/cqweb/cqregsvr/cqregsvr_service.properties:wrapper.jvm.options=-Xrs<br>
201 //dfls85/Rational/Common/rwp/bin/jk_service2.default.properties:wrapper.jvm.options=-Xrs
202 -Xms2m -Xmx256m<br>
203 //dfls85/Rational/Common/rwp/bin/jk_service2.in.properties:wrapper.jvm.options=-Xrs
204 -Xms2m -Xmx256m<br>
205 //dfls85/Rational/Common/rwp/bin/jk_service2.properties:wrapper.jvm.options=-Xrs
206 -Xms2m -Xmx256m<br>
207 //dfls85/Rational/ClearQuest/cqweb/cqserver/requestmgr_service.properties:wrapper.jvm.options=-Xrs<br>
208 //dfls85/Rational/ClearQuest/cqweb/cqregsvr/cqregsvr_service.properties:wrapper.jvm.options=-Xrs<br>
209  </pre></div>
210
211 </blockquote>
212   <p>All these machines have 2 gig of main memory and largely just serve CQWeb. Indeed the CQWeb service processes are consuming most of the memory:</p>
213
214 <div align="center"><img title="dfls83"  src="/blogs/Status/images/dfls83.jpg" alt="" height="541"  width="524">
215 <b>dfls83</b><br>
216 <img title="dfls84" src="/blogs/Status/images/dfls84.jpg" alt=""  height="545" width="525">
217 <b>dfls84</b>
218 <br>
219 <img title="dfls85" src="/blogs/Status/images/dfls85.jpg" alt="" height="577" width="528">
220 <b>dfls85</b>
221 </div>
222
223 <p>I think we should try setting at least the following:</p>
224
225 <div class=code><pre>
226 wrapper.jvm.options=-Xrs -Xms128m -Xmx512m
227 </pre></div>
228
229 <p>A restart of all CQ Web services would probably be needed for the changes to become effective. The above settings start off the jvm @ 128m for all 4 processes thus a total memory footprint of 512 Meg and limit each process to 512 Meg max for a total footprint of 2 Gig (when full). We might want to bounce this idea off IBM/Rational support to see if all 4 process should have the same settings or if we show vary
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467     
468   
469     
470       <option value="http://defaria.com/blogs/Status/2008/04/">April 2008</option>
471     
472   
473     
474       <option value="http://defaria.com/blogs/Status/2008/03/">March 2008</option>
475     
476   
477     
478       <option value="http://defaria.com/blogs/Status/2008/02/">February 2008</option>
479     
480   
481     
482       <option value="http://defaria.com/blogs/Status/2008/01/">January 2008</option>
483     
484   
485     
486       <option value="http://defaria.com/blogs/Status/2007/12/">December 2007</option>
487     
488   
489     
490       <option value="http://defaria.com/blogs/Status/2007/11/">November 2007</option>
491     
492   
493     
494       <option value="http://defaria.com/blogs/Status/2007/10/">October 2007</option>
495     
496   
497     
498       <option value="http://defaria.com/blogs/Status/2007/09/">September 2007</option>
499     
500   
501     
502       <option value="http://defaria.com/blogs/Status/2007/08/">August 2007</option>
503     
504   
505     
506       <option value="http://defaria.com/blogs/Status/2007/07/">July 2007</option>
507     
508   
509     
510       <option value="http://defaria.com/blogs/Status/2007/06/">June 2007</option>
511     
512   
513     
514       <option value="http://defaria.com/blogs/Status/2007/05/">May 2007</option>
515     
516   
517     
518       <option value="http://defaria.com/blogs/Status/2007/04/">April 2007</option>
519     
520   
521     
522       <option value="http://defaria.com/blogs/Status/2007/03/">March 2007</option>
523     
524   
525     
526       <option value="http://defaria.com/blogs/Status/2007/01/">January 2007</option>
527     
528   
529     
530       <option value="http://defaria.com/blogs/Status/2006/12/">December 2006</option>
531     
532   
533     
534       <option value="http://defaria.com/blogs/Status/2006/11/">November 2006</option>
535     
536   
537     
538       <option value="http://defaria.com/blogs/Status/2006/10/">October 2006</option>
539     
540   
541     
542       <option value="http://defaria.com/blogs/Status/2006/09/">September 2006</option>
543     
544   
545     
546       <option value="http://defaria.com/blogs/Status/2006/07/">July 2006</option>
547     
548   
549     
550       <option value="http://defaria.com/blogs/Status/2006/06/">June 2006</option>
551     
552   
553     
554       <option value="http://defaria.com/blogs/Status/2006/05/">May 2006</option>
555     
556   
557     
558       <option value="http://defaria.com/blogs/Status/2006/04/">April 2006</option>
559     
560   
561     
562       <option value="http://defaria.com/blogs/Status/2006/03/">March 2006</option>
563     
564   
565     
566       <option value="http://defaria.com/blogs/Status/2006/02/">February 2006</option>
567     
568   
569     
570       <option value="http://defaria.com/blogs/Status/2006/01/">January 2006</option>
571     
572   
573     
574       <option value="http://defaria.com/blogs/Status/2005/12/">December 2005</option>
575     
576   
577     
578       <option value="http://defaria.com/blogs/Status/2005/11/">November 2005</option>
579     
580   
581     
582       <option value="http://defaria.com/blogs/Status/2005/10/">October 2005</option>
583     
584   
585     
586       <option value="http://defaria.com/blogs/Status/2005/09/">September 2005</option>
587     
588   
589     
590       <option value="http://defaria.com/blogs/Status/2005/08/">August 2005</option>
591     
592   
593     
594       <option value="http://defaria.com/blogs/Status/2005/07/">July 2005</option>
595     
596   
597     
598       <option value="http://defaria.com/blogs/Status/2005/06/">June 2005</option>
599     
600   
601     
602       <option value="http://defaria.com/blogs/Status/2005/05/">May 2005</option>
603     
604   
605     
606       <option value="http://defaria.com/blogs/Status/2005/04/">April 2005</option>
607     
608   
609     
610       <option value="http://defaria.com/blogs/Status/2005/03/">March 2005</option>
611     
612   
613     
614       <option value="http://defaria.com/blogs/Status/2005/02/">February 2005</option>
615     
616   
617     
618       <option value="http://defaria.com/blogs/Status/2005/01/">January 2005</option>
619     
620   
621     
622       <option value="http://defaria.com/blogs/Status/2004/12/">December 2004</option>
623     
624   
625     
626       <option value="http://defaria.com/blogs/Status/2004/09/">September 2004</option>
627     
628   
629     
630       <option value="http://defaria.com/blogs/Status/2004/08/">August 2004</option>
631     
632   
633     
634       <option value="http://defaria.com/blogs/Status/2004/07/">July 2004</option>
635     
636   
637     
638       <option value="http://defaria.com/blogs/Status/2004/06/">June 2004</option>
639     
640   
641     
642       <option value="http://defaria.com/blogs/Status/2004/05/">May 2004</option>
643     
644   
645     
646       <option value="http://defaria.com/blogs/Status/2004/04/">April 2004</option>
647     
648   
649     
650       <option value="http://defaria.com/blogs/Status/2004/03/">March 2004</option>
651     
652   
653     
654       <option value="http://defaria.com/blogs/Status/2004/02/">February 2004</option>
655     
656   
657     
658       <option value="http://defaria.com/blogs/Status/2004/01/">January 2004</option>
659     
660   
661     
662       <option value="http://defaria.com/blogs/Status/2003/12/">December 2003</option>
663     
664   
665     
666       <option value="http://defaria.com/blogs/Status/2003/11/">November 2003</option>
667     
668     </select>
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