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From conflue...@apache.org
Subject [CONF] Apache Geronimo v3.0 > Runtime issues
Date Fri, 15 Jul 2011 03:38:00 GMT
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    <h2><a href="https://cwiki.apache.org/confluence/display/GMOxDOC30/Runtime+issues">Runtime
issues</a></h2>
    <h4>Page <b>edited</b> by             <a href="https://cwiki.apache.org/confluence/display/~gawor">Jarek
Gawor</a>
    </h4>
        <br/>
                         <h4>Changes (14)</h4>
                                 
    
<div id="page-diffs">
                    <table class="diff" cellpadding="0" cellspacing="0">
    
            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" > <br>h2. JVM arguments <br></td></tr>
            <tr><td class="diff-changed-lines" >Apache Geronimo v3.0 is Java EE
6 <span class="diff-changed-words">compliant<span class="diff-added-chars"style="background-color:
#dfd;"> application server</span>.</span> With that said, it will likely run
on different JVM versions however the results may be unpredictable. <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">Whenever
possible use jdk 1.6 or above.</span> <span class="diff-added-words"style="background-color:
#dfd;">Geronimo v3.0 requires Java 1.6.</span> <br></td></tr>
            <tr><td class="diff-unchanged" > <br>Another common problem
related to Java is that, sometimes, certain environment variables are not defined at Java
installation time. For instance, Geronimo requires *JAVA_HOME* and *JRE_HOME* to be defined
before running the server. As a convenience, make sure you also add {{&lt;JAVA_HOME&gt;/bin}}
directory to the system *PATH*. <br> <br></td></tr>
            <tr><td class="diff-deleted-lines" style="color:#999;background-color:#fdd;text-decoration:line-through;">You
can choose one of following options to use JVM arguments depending on how you&#39;re starting
Geronimo <br># startup.sh or geronimo.sh run <br></td></tr>
            <tr><td class="diff-added-lines" style="background-color: #dfd;">You
can choose one of following options to pass additional JVM arguments when starting Geronimo
using {{geronimo}} or {{startup}} scripts: <br></td></tr>
            <tr><td class="diff-changed-lines" ><span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">#*</span>
<span class="diff-added-words"style="background-color: #dfd;">#</span> set JAVA_OPTS
environment variable: <br></td></tr>
            <tr><td class="diff-unchanged" >{noformat:borderStyle=solid} <br>jeffchi@Local:~/geronimo-tomcat7-javaee6-3.0-SNAPSHOT$
export JAVA_OPTS=&quot;-Xmx256m -XX:MaxPermSize=128m -XX:+HeapDumpOnOutOfMemoryError&quot;
 <br></td></tr>
            <tr><td class="diff-deleted-lines" style="color:#999;background-color:#fdd;text-decoration:line-through;">jeffchi@Local:~/geronimo-tomcat7-javaee6-3.0-SNAPSHOT$./bin/geronimo.sh
run <br></td></tr>
            <tr><td class="diff-added-lines" style="background-color: #dfd;">jeffchi@Local:~/geronimo-tomcat7-javaee6-3.0-SNAPSHOT$
./bin/geronimo run <br></td></tr>
            <tr><td class="diff-unchanged" >{noformat} <br></td></tr>
            <tr><td class="diff-changed-lines" ><span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">#*</span>
<span class="diff-added-words"style="background-color: #dfd;">#</span> and/or
append the following code to <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">{{&lt;Geronimo_Home&gt;/bin/setjavaenv.sh(bat)}}</span>
<span class="diff-added-words"style="background-color: #dfd;">{{&lt;GERONIMO_HOME&gt;/bin/setjavaenv.sh(bat)}}</span>
file: <br></td></tr>
            <tr><td class="diff-changed-lines" ><span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">{code}</span>
<span class="diff-added-words"style="background-color: #dfd;">{noformat:borderStyle=solid}</span>
<br></td></tr>
            <tr><td class="diff-unchanged" >       if [ -z &quot;$JAVA_OPTS&quot;
]; then <br>          JAVA_OPTS=&quot;-Xmx256m -XX:MaxPermSize=128m -XX:+HeapDumpOnOutOfMemoryError&quot;
<br>       fi <br></td></tr>
            <tr><td class="diff-deleted-lines" style="color:#999;background-color:#fdd;text-decoration:line-through;">{code}
<br># start-server or gsh geronimo/start-server <br>#* edit {{&lt;Geronimo_Home&gt;/etc/rc.d/start-server,default.groovy}}
file: <br>{code} <br>       // Append some reasonable java flags if none were
configured already <br>       if (command.javaFlags.empty) { <br>           command.javaFlags
&lt;&lt; &#39;-Xmx256m&#39; <br>           command.javaFlags &lt;&lt;
&#39;-XX:MaxPermSize=128m&#39; <br>           command.javaFlags &lt;&lt;
&#39;-XX:+HeapDumpOnOutOfMemoryError&#39; <br>       } <br>{code} <br>#*
or use *-J* flag: <br>{noformat:BorderStyle=Solid} <br>jeffchi@Local:~/geronimo-tomcat7-javaee6-3.0-SNAPSHOT$./bin/gsh
geronimo/start-server -J &quot;-Xmx256m -XX:MaxPermSize=128m -XX:+HeapDumpOnOutOfMemoryError&quot;
<br></td></tr>
            <tr><td class="diff-unchanged" >{noformat} <br> <br></td></tr>
            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" >The Sun/Oracle-based JVM is attempting
to generate a pseudo-random number to be used as a seed for an SSL server socket. To generate
the pseudo-random number, the JVM is reading from the /dev/random device to obtain some random
information for the seed. The problem is that reads from the /dev/random device will block
if the system does not have a good source of random events. So, the Geronimo server startup
is blocked waiting for enough random information to be returned from /dev/random. This article
may be help understand the basic issue -- [http://en.wikipedia.org/wiki//dev/random#Linux]
<br> <br></td></tr>
            <tr><td class="diff-changed-lines" >To avoid the problem, you can
choose to use the /dev/urandom device, instead of /dev/random, by specifying the following
java property {{-Djava.security.egd=file:/dev/./urandom}}. For <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">exmaple,</span>
<span class="diff-added-words"style="background-color: #dfd;">example,</span>
start the server using the following command: <br></td></tr>
            <tr><td class="diff-changed-lines" ><span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">{panel}</span>
<span class="diff-added-words"style="background-color: #dfd;">{noformat:borderStyle=solid}</span>
<br></td></tr>
            <tr><td class="diff-added-lines" style="background-color: #dfd;">$
export GERONIMO_OPTS=&quot;-Djava.security.egd=file:/dev/./urandom&quot;  <br></td></tr>
            <tr><td class="diff-changed-lines" >$ <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">GERONIMO_OPTS=&quot;-Djava.security.egd=file:/dev/./urandom&quot;</span>
./geronimo run --long <br></td></tr>
            <tr><td class="diff-changed-lines" ><span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">{panel}</span>
<span class="diff-added-words"style="background-color: #dfd;">{noformat}</span>
<br></td></tr>
            <tr><td class="diff-unchanged" > <br>h2. Port conflicts <br></td></tr>
            <tr><td class="diff-snipped" >...<br></td></tr>
    
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/*]]>*/</style><div class="Scrollbar"><table class='ScrollbarTable'><tr><td
class='ScrollbarPrevIcon'><a href="/confluence/display/GMOxDOC30/Development+issues"><img
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width='33%' class='ScrollbarPrevName'><a href="/confluence/display/GMOxDOC30/Development+issues">Development
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<p>Most of the issues you may find when running Geronimo will be at start up time; and
most likely driven by some conflicting resources from the environment where Geronimo is set
up.</p>
<div>
<ul>
    <li><a href='#Runtimeissues-JVMarguments'>JVM arguments</a></li>
    <li><a href='#Runtimeissues-ServerhangsduetolowentropyonLinux'>Server hangs
due to low entropy on Linux</a></li>
    <li><a href='#Runtimeissues-Portconflicts'>Port conflicts</a></li>
    <li><a href='#Runtimeissues-Springversionconflicts'>Spring version conflicts</a></li>
    <li><a href='#Runtimeissues-java.lang.UnsatisfiedLinkError%3Alic%28LibraryisalreadyloadedinanotherClassLoader%29'>java.lang.UnsatisfiedLinkError:
lic (Library is already loaded in another ClassLoader)</a></li>
    <li><a href='#Runtimeissues-EnablemulticastingforIPv4network'>Enable multicasting
for IPv4 network</a></li>
    <li><a href='#Runtimeissues-java.io.IOExceptionofremoteEJBonWindows'>java.io.IOException
of remote EJB on Windows</a></li>
</ul></div>

<h2><a name="Runtimeissues-JVMarguments"></a>JVM arguments</h2>
<p>Apache Geronimo v3.0 is Java EE 6 compliant application server. With that said, it
will likely run on different JVM versions however the results may be unpredictable. Geronimo
v3.0 requires Java 1.6. </p>

<p>Another common problem related to Java is that, sometimes, certain environment variables
are not defined at Java installation time. For instance, Geronimo requires <b>JAVA_HOME</b>
and <b>JRE_HOME</b> to be defined before running the server. As a convenience,
make sure you also add <tt>&lt;JAVA_HOME&gt;/bin</tt> directory to the
system <b>PATH</b>.</p>

<p>You can choose one of following options to pass additional JVM arguments when starting
Geronimo using <tt>geronimo</tt> or <tt>startup</tt> scripts:</p>
<ol>
	<li>set JAVA_OPTS environment variable:
<div class="preformatted panel" style="border-style: solid;border-width: 1px;"><div
class="preformattedContent panelContent">
<pre>jeffchi@Local:~/geronimo-tomcat7-javaee6-3.0-SNAPSHOT$ export JAVA_OPTS="-Xmx256m
-XX:MaxPermSize=128m -XX:+HeapDumpOnOutOfMemoryError" 
jeffchi@Local:~/geronimo-tomcat7-javaee6-3.0-SNAPSHOT$ ./bin/geronimo run
</pre>
</div></div></li>
	<li>and/or append the following code to <tt>&lt;GERONIMO_HOME&gt;/bin/setjavaenv.sh(bat)</tt>
file:
<div class="preformatted panel" style="border-style: solid;border-width: 1px;"><div
class="preformattedContent panelContent">
<pre>       if [ -z "$JAVA_OPTS" ]; then
          JAVA_OPTS="-Xmx256m -XX:MaxPermSize=128m -XX:+HeapDumpOnOutOfMemoryError"
       fi
</pre>
</div></div></li>
</ol>


<h2><a name="Runtimeissues-ServerhangsduetolowentropyonLinux"></a>Server
hangs due to low entropy on Linux</h2>
<p>When starting a Geronimo server on a Linux system, the server start seems to hang.
However, if you're patient, the server will eventually start. If you're inquisitive, and dump
the stack traces of the java process, you'll see something like:</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">
<span class="code-quote">"main"</span> prio=10 tid=0x0000000040c0d800 nid=0xa79
runnable [0x00007f57a04fb000]
  java.lang.<span class="code-object">Thread</span>.State: RUNNABLE
       at java.io.FileInputStream.readBytes(Native Method)
       at java.io.FileInputStream.read(FileInputStream.java:220)
       at sun.security.provider.NativePRNG$RandomIO.readFully(NativePRNG.java:185)
       at sun.security.provider.NativePRNG$RandomIO.implGenerateSeed(NativePRNG.java:202)
       - locked &lt;0x00000000daad63e0&gt; (a java.lang.<span class="code-object">Object</span>)
       at sun.security.provider.NativePRNG$RandomIO.access$300(NativePRNG.java:108)
       at sun.security.provider.NativePRNG.engineGenerateSeed(NativePRNG.java:102)
       at java.security.SecureRandom.generateSeed(SecureRandom.java:495)
       at com.sun.net.ssl.internal.pkcs12.PKCS12KeyStore.getSalt(PKCS12KeyStore.java:477)
       at com.sun.net.ssl.internal.pkcs12.PKCS12KeyStore.calculateMac(PKCS12KeyStore.java:834)
       at com.sun.net.ssl.internal.pkcs12.PKCS12KeyStore.engineStore(PKCS12KeyStore.java:788)
       - locked &lt;0x00000000d3b5a768&gt; (a com.sun.net.ssl.internal.pkcs12.PKCS12KeyStore)
       at java.security.KeyStore.store(KeyStore.java:1117)
...
</pre>
</div></div>
<p>This problem isn't Geronimo specific. </p>

<p>The Sun/Oracle-based JVM is attempting to generate a pseudo-random number to be used
as a seed for an SSL server socket. To generate the pseudo-random number, the JVM is reading
from the /dev/random device to obtain some random information for the seed. The problem is
that reads from the /dev/random device will block if the system does not have a good source
of random events. So, the Geronimo server startup is blocked waiting for enough random information
to be returned from /dev/random. This article may be help understand the basic issue &#8211;
<a href="http://en.wikipedia.org/wiki//dev/random#Linux" class="external-link" rel="nofollow">http://en.wikipedia.org/wiki//dev/random#Linux</a></p>

<p>To avoid the problem, you can choose to use the /dev/urandom device, instead of /dev/random,
by specifying the following java property <tt>-Djava.security.egd=<a href="file:/dev/./urandom"
class="external-link" rel="nofollow">file:/dev/./urandom</a></tt>. For example,
start the server using the following command:</p>
<div class="preformatted panel" style="border-style: solid;border-width: 1px;"><div
class="preformattedContent panelContent">
<pre>$ export GERONIMO_OPTS="-Djava.security.egd=file:/dev/./urandom" 
$ ./geronimo run --long
</pre>
</div></div>

<h2><a name="Runtimeissues-Portconflicts"></a>Port conflicts</h2>
<p>The second most common startup issue is associated to port conflicts, check no other
application is using or blocking Geronimo's default ports:</p>

<div class='table-wrap'>
<table class='confluenceTable'><tbody>
<tr>
<th class='confluenceTh'>Service</th>
<th class='confluenceTh'> Port</th>
</tr>
<tr>
<td class='confluenceTd'>SMTPPort</td>
<td class='confluenceTd'>		25</td>
</tr>
<tr>
<td class='confluenceTd'>COSNamingPort</td>
<td class='confluenceTd'>		1050</td>
</tr>
<tr>
<td class='confluenceTd'>NamingPort</td>
<td class='confluenceTd'>		1099</td>
</tr>
<tr>
<td class='confluenceTd'>ORBSSLPort</td>
<td class='confluenceTd'>		2001</td>
</tr>
<tr>
<td class='confluenceTd'>OpenEJBPort</td>
<td class='confluenceTd'>		4201</td>
</tr>
<tr>
<td class='confluenceTd'>ORBPort</td>
<td class='confluenceTd'>		6882</td>
</tr>
<tr>
<td class='confluenceTd'>AJPPort</td>
<td class='confluenceTd'>		8009</td>
</tr>
<tr>
<td class='confluenceTd'>HTTPPort</td>
<td class='confluenceTd'>		8080</td>
</tr>
<tr>
<td class='confluenceTd'>HTTPSPort</td>
<td class='confluenceTd'>		8443</td>
</tr>
<tr>
<td class='confluenceTd'>JMXPort</td>
<td class='confluenceTd'>		9999</td>
</tr>
<tr>
<td class='confluenceTd'>ActiveMQStompPort</td>
<td class='confluenceTd'>	61613</td>
</tr>
<tr>
<td class='confluenceTd'>ActiveMQPort</td>
<td class='confluenceTd'>		61616</td>
</tr>
</tbody></table>
</div>


<p>If you identify port conflicts you can use the <tt>&lt;GERONIMO_HOME&gt;/var/config/config-substitutions.properties</tt>
to change any of these ports. From this configuration file you can also set a port offset
and have all these increased by that amount.</p>

<p>Keep also in mind that personal firewalls, anti virus and spyware protection products
may block some of these ports as well, even if you turn off such software sometimes those
"rules" are still in effect.</p>

<p>Refer to the <a href="/confluence/display/GMOxDOC30/Initial+configuration" title="Initial
configuration">Initial configuration</a> section for additional details on prerequisites
and different configurations.</p>

<h2><a name="Runtimeissues-Springversionconflicts"></a>Spring version conflicts</h2>

<p>If your application contains its own version of Spring you might see some problems
deploying or running the application on the Jetty assembly. The Jetty assembly is by default
configured with Apache CXF as the JAX-WS provider. Apache CXF uses Spring to configure itself.
Sometimes, the Spring version used by CXF conflicts with the Spring version supplied with
your application. To prevent these conflicts add the following &lt;hidden-classes&gt;
entry to the Geronimo deployment descriptor:</p>

<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-xml"> 
<span class="code-tag">&lt;hidden-classes&gt;</span>    
    <span class="code-tag">&lt;filter&gt;</span>org.springframework<span
class="code-tag">&lt;/filter&gt;</span>
    <span class="code-tag">&lt;filter&gt;</span>META-INF/spring<span
class="code-tag">&lt;/filter&gt;</span>
<span class="code-tag">&lt;/hidden-classes&gt;</span>
</pre>
</div></div>

<h2><a name="Runtimeissues-java.lang.UnsatisfiedLinkError%3Alic%28LibraryisalreadyloadedinanotherClassLoader%29"></a>java.lang.UnsatisfiedLinkError:
lic (Library is already loaded in another ClassLoader)</h2>

<p>This can be caused by the same jar (such as an Oracle Driver using OCI) being loaded
in two separate class loaders, each trying to load a system library.</p>

<p>To avoid the problem, you may try <a href="/confluence/display/GMOxDOC30/Adding+JARs+to+the+Geronimo+repository"
title="Adding JARs to the Geronimo repository">Adding JARs to the Geronimo repository</a>
and define the dependency in your deployment plan. <br/>
See Also : <a href="https://issues.apache.org/jira/browse/GERONIMO-4629" class="external-link"
rel="nofollow">https://issues.apache.org/jira/browse/GERONIMO-4629</a></p>

<h2><a name="Runtimeissues-EnablemulticastingforIPv4network"></a>Enable
multicasting for IPv4 network</h2>

<p>To use multicasting properly in a clustered enviornment, you will need to set the
system property <tt>java.net.preferIPv4Stack</tt> to <tt>true</tt>
when starting Geronimo.</p>

<h2><a name="Runtimeissues-java.io.IOExceptionofremoteEJBonWindows"></a>java.io.IOException
of remote EJB on Windows</h2>

<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">
javax.naming.NamingException: Cannot lookup'/MyBeanRemote'. 
[Root exception is java.rmi.RemoteException: Cannot connect to server 'ejbd:<span class="code-comment">//localhost:4201";

</span>nested exception is: java.io.IOException: Cannot connect to server: 'ejbd:<span
class="code-comment">//localhost:4201'.  
</span>Exception: java.net.BindException : Address already in use: connect]
	at org.apache.openejb.client.JNDIContext.lookup(JNDIContext.java:214)
	at javax.naming.InitialContext.lookup(Unknown Source)
	at MyClientScalabilityTest$MyClientTest.call(MyClientScalabilityTest.java:86)
	at MyClientScalabilityTest$MyClientTest.call(MyClientScalabilityTest.java:1)
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.<span class="code-object">Thread</span>.run(Unknown Source)
Caused by: java.rmi.RemoteException: Cannot connect to server 'ejbd:<span class="code-comment">//localhost:4201";
nested exception is:
</span>	java.io.IOException: Cannot connect to server: 'ejbd:<span class="code-comment">//localhost:4201'.
 
</span>        Exception: java.net.BindException : Address already in use: connect
</pre>
</div></div>

<p>One possibility is that the available user port numbers are being exhausted.  On
Windows, when a socket is closed, it goes into a TIME_WAIT state and isn't actually closed
until some delay time.  By default, the max user port address is 5000 and the TIME_WAIT delay
is 4 minutes. So, it's not too difficult to exhaust all possible user port addresses.</p>

<p>You have to update the Windows Registry to change these values. Here's a Windows
2000 doc on the registry settings &#8211; <a href="http://technet.microsoft.com/en-us/library/bb726981.aspx"
class="external-link" rel="nofollow">http://technet.microsoft.com/en-us/library/bb726981.aspx</a></p>

<ul class="alternate" type="square">
	<li>MaxUserPorts controls the upper range for user ports.</li>
	<li>TcpTimedWaitDelay controls the TIME_WAIT delay.</li>
</ul>


<p>Increasing MaxUserPorts (e.g. 65534) and decreasing TcpTimedWaitDelay (e.g. 30) may
fix the problem.</p>


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