Pierpaolo Fumagalli <[EMAIL PROTECTED]> wrote:
>
>[EMAIL PROTECTED] wrote:
>> After running for several hours, servicing thousands of requests, jserv
>> suddenly died with
>>
>> Exception in thread "main" java.lang.OutOfMemoryError
>> at java.lang.Thread.start(Native Method)
>> at java.lang.Thread.start(Compiled Code)
>> at org.apache.jserv.JServ.main(Compiled Code)
It happened again about an hour after I posted this.
>> Of course, I understand that this means that jserv ran out of memory.
But
>> why? And how can I avoid this?
>>
>Can you try removing logging - in jserv.properties put:
>
>log=false
>log.file=/usr/local/apache/logs/jserv_log.log
>log.timestamp=truelog.dateFormat=[dd/MM/yyyy HH:mm:ss:SSS zz]
>log.channel.init=true
>log.channel.terminate=true
>log.channel.serviceRequest=true
>log.channel.authentication=false
>log.channel.requestData=false
>log.channel.responseHeaders=false
>log.channel.signal=true
>log.channel.exceptionTracing=true
>log.channel.servletManager=true
>
>Give it a shot....
Ok thanks. I did that. So far so good.
>(If you want to try it harder, you could look @ our JMeter...)
I did. I ran it full blast for several hours and all was as it should
be. I also tried running a much more interesting test using a perl
script where I made it go through the traffic of the past week as fast
as it could, from three different streams. It was very much stress
tested. Everything looked beautiful before I brought it online.
Out of paranoia I have running on my box a little script that will
restart apache if another out of memory error occurs:
#!/usr/local/bin/perl -w
# this is a lovely hack for recovering from out of memory errors in jserv
$log='/opt/apache/logs/error';
$ap='/opt/apache/bin/apachectl';
open(LOG, $log) || die "couldn't open $log: $!\n";
# jump to the end of the log
seek(LOG, 0, 2);
$| = 1;
# recover from log roll-overs by keeping track of the size of the log
my $s = -s $log;
while(1){
while(<LOG>){
if(/Exception in thread \"main\" java\.lang\.OutOfMemoryError/){
system("$ap stop") || die $!;
sleep 7;
system("$ap start") || die $!;
my @lt = localtime(time);
$year = $lt[5] + 1900;
$month = $lt[4] + 1;
$day = $lt[3];
printf("yikes %d%.2d%.2d\n", $year, $month, $day);
}
}
sleep 1;
my $s1 = -s $log;
if($s1 < $s){
close(LOG);
open(LOG, $log);
} else {
seek(LOG, 0, 1);
}
$s = $s1;
}
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