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To: tomcat-user@jakarta.apache.org
From: Santosh Pasi<spasi@diskonnet.com>
Cc: 
X-Mailer: Perl Mail::Sender Version 0.6.7 Jan Krynicky  <Jenda@Krynicky.cz>
 Czech Republic
reply-to: Santosh Pasi<spasi@diskonnet.com>
Message-ID: 997426804spasi@diskonnet.com
Date: Fri, 10 Aug 2001	12:30:04 +0530
In-Reply-To: message997421139.spasi@diskonnet.com
Subject: Re: Jakarta crashes simultaneous more connection above 990+
X-Spam-Rating: h31.sny.collab.net 1.6.2 0/1000/N

Hi,

Even changing pools setting like
Increasing the pool size resolved the problem, specifically the
following parameters (neatly copied from the tomcat users guide)

           <Parameter
                 name="max_threads"
                 value="200"/>
             <Parameter
                 name="max_spare_threads"
                 value="20"/>
             <Parameter
                 name="min_spare_threads"
                 value="20" />

The values were arbitrary - I stuck mine up to max_threads = 200,
max_spare_threads=20, min_spare_threads=20
and lo - the hang problem  went away.

Even I had used options

TOMCAT_OPTS=" -Xms64m"

Didn't solve the problem.

Still same problem.

Regards,
Santosh Pasi

---------------Original Message------------------
Mailing-List: contact tomcat-user-help@jakarta.apache.org; run by ezmlm
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>From: Santosh Pasi<spasi@diskonnet.com>
>Cc: 
>Reply-To: Santosh Pasi<spasi@diskonnet.com>
>Date: Fri, 10 Aug 2001	10:55:26 +0530
>Subject: Jakarta crashes after 900+ simultaneous connection
>
>Hi everyone,
>
>We are doing some stress testing. My problem is that when number of 
>connections reaches around 940..980, jakarta crashes with following 
messages------------------------------------------------------------->SIGSEGV   11*  segmentation violation
>    si_signo [11]: SIGSEGV   11*  segmentation violation
>    si_errno [0]: Success
>    si_code [0]: SI_USER [pid: 0, uid: 0]
>        stackpointer=0x4c558554
>
>Full thread dump Classic VM (1.2.2-L, green threads):
>    "ppp202" (TID:0x40fb7190, sys_thread_t:0x8d0dec0, state:R) prio=5
>        at java.net.SocketInputStream.socketRead(Native Method)
>        at java.net.SocketInputStream.read(SocketInputStream.java:86)
>        at java.net.SocketInputStream.read(SocketInputStream.java:67)
>        at java.io.InputStreamReader.fill(InputStreamReader.java:159)
>        at java.io.InputStreamReader.read(InputStreamReader.java:235)
>        at java.io.BufferedReader.fill(BufferedReader.java:133)
>        at java.io.BufferedReader.readLine(BufferedReader.java:270)
>        at java.io.BufferedReader.readLine(BufferedReader.java:325)
>        at IRCClient.run(IRCClient.java:799)
>    "bumba174" (TID:0x40f88f90, sys_thread_t:0x8d0b358, state:CW) prio=5
>        at java.lang.Thread.sleep(Native Method)
>        at IRCClient.run(IRCClient.java:765)
>    "sunny1176" (TID:0x40f75b28, sys_thread_t:0x8d0b930, state:CW) 
prio=5>        at java.lang.Thread.sleep(Native Method)
>
>
>......
>......
>
>-------------------------------------------------------------
>
>We are using redhat 6.2 Linux, kernel 2.2.16, Tomcat-jakarta-3.2.1, 
>apache 1.3.14.
>Hope to get some reply.
>
>Regards,
>Santosh Pasi
>
>