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List: geronimo-user
Subject: Re: Strange memory problems / white screens
From: Peter Petersson <peter () pmb ! mine ! nu>
Date: 2007-07-19 18:34:45
Message-ID: 469FAEC5.9060704 () pmb ! mine ! nu
[Download RAW message or body]
Ian Hunter wrote:
>
> Where do I find the output from --verbose:gc -- I don't see anything
> new in geronimo.log.
>
The output should be in var/log/geronimo.out (its located alongside with
geronimo.log) or it may be printed in the console depending on the
method you use to start the server.
regards
Peter Petersson
>
>
>
>
>
> ------------------------------------------------------------------------
>
> *From:* Kevan Miller [mailto:kevan.miller@gmail.com]
> *Sent:* Thursday, July 19, 2007 10:41 AM
> *To:* user@geronimo.apache.org
> *Subject:* Re: Strange memory problems / white screens
>
>
>
>
>
> On Jul 19, 2007, at 10:14 AM, Ian Hunter wrote:
>
>
>
> We've noticed a problem where intermittently Geronimo starts failing
> to respond to web requests (browser symptom is a blank white screen)
> -- when this starts happening, we notice that on the system info tab,
> the memory metrics display "Not Yet Available" but after we restart
> Geronimo completely, web requests work and the memory values display.
>
>
>
> Has anyone else seen anything like this?
>
>
>
> Hi Ian,
>
> Any errors showing up in var/log/geronimo.log? Is this behavior truly
> intermittent or somewhat predictable? I would suspect that you have a
> memory leak... Have you tracked memory utilization?
>
>
>
> I've found the following useful:
>
>
>
> export JAVA_OPTS=" -verbose:gc -XX:+PrintGCDetails
> -XX:+HeapDumpOnOutOfMemoryError"
>
>
>
> First two options will cause GC statistics to be printed by the JVM.
>
>
>
> HeapDumpOnOutOfMemoryError will cause a heap dump to be created on
> OOME conditions. Very handy for post-mortem analysis... There's no
> overhead associated with this setting (only pay a cost when you run
> out of memory).
>
>
>
> --kevan
>
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Ian Hunter wrote:
<blockquote cite="mid:008801c7ca1d$e0546c80$8328a8c0@ihunterlap"
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Where do I
find the output from –verbose:gc
– I don’t see anything new in geronimo.log.</span></font></p>
</div>
</blockquote>
The output should be in var/log/geronimo.out (its located alongside
with geronimo.log) or it may be printed in the console depending on the
method you use to start the server.<br>
<br>
regards<br>
Peter Petersson<br>
<blockquote cite="mid:008801c7ca1d$e0546c80$8328a8c0@ihunterlap"
type="cite">
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navy;"><o:p> </o:p></span></font></p> <div>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span
style="font-size: 10pt; font-family: Tahoma; font-weight: \
bold;">From:</span></font></b><font face="Tahoma" size="2"><span
style="font-size: 10pt; font-family: Tahoma;"> Kevan Miller
[<a class="moz-txt-link-freetext" \
href="mailto:kevan.miller@gmail.com">mailto:kevan.miller@gmail.com</a>] <br> \
<b><span style="font-weight: bold;">Sent:</span></b> Thursday, July 19, 2007
10:41 AM<br>
<b><span style="font-weight: bold;">To:</span></b>
<a class="moz-txt-link-abbreviated" \
href="mailto:user@geronimo.apache.org">user@geronimo.apache.org</a><br> <b><span \
style="font-weight: bold;">Subject:</span></b> Re: Strange memory problems
/ white screens</span></font><o:p></o:p></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
<div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;">On Jul 19, 2007, at 10:14 AM, Ian Hunter
wrote:<o:p></o:p></span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><br>
<br>
<o:p></o:p></span></font></p>
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Arial; color: black;"><span style="border-spacing: 0px; orphans: 2; widows: 2; \
word-spacing: 0px;">We’ve noticed a problem where intermittently Geronimo \
starts failing to respond to
web requests (browser symptom is a blank white screen) – when this
starts
happening, we notice that on the system info tab, the memory metrics
display
“Not Yet Available” but after we restart Geronimo completely, web
requests work
and the memory values display.<O:P
style="font-family: Arial; font-size: \
13.3333px;"></O:P></span></span></font></O:SMARTTAGTYPE></O:SMARTTAGTYPE></O:SMARTTAGT \
YPE></O:SMARTTAGTYPE></O:SMARTTAGTYPE></O:SMARTTAGTYPE></O:SMARTTAGTYPE></span><font \
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class="MsoNormal" style=""><span class="apple-style-span"><O:P style="font-family: \
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black;"><o:p></o:p></span></font></p> <p class="MsoNormal" style=""><span \
class="apple-style-span"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: black;">Has anyone
else seen
anything like this?</span></font></span><font color="black"><span
style="color: black;"><o:p></o:p></span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;">Hi Ian,<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;">Any errors showing up in
var/log/geronimo.log? Is this behavior truly
intermittent or somewhat predictable? I would suspect that you have a
memory
leak... Have you tracked memory utilization?<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;">I've found the following \
useful:<o:p></o:p></span></font></p> </div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;">export JAVA_OPTS=" -verbose:gc
-XX:+PrintGCDetails
-XX:+HeapDumpOnOutOfMemoryError"<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;">First two options will cause GC statistics to
be printed by the JVM.<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;">HeapDumpOnOutOfMemoryError will cause a heap
dump to be created on OOME
conditions. Very handy for post-mortem analysis... There's no overhead
associated with this setting (only pay a cost when you run out of
memory). <o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;">--kevan <o:p></o:p></span></font></p>
</div>
</div>
</blockquote>
<br>
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