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Hi there,
I have a crushial problem with the JServ Engine. The engine crashes, if it
is hit by many requests. You can test it by sending the same request for
about 30 times within a short time (clicking on the same button very fast),
but the error occurs also if there are many users online at the server at
the same time. The result is an Internal Server Error. The servlet engine
looses all sessions and is available again after about 2 minutes.
The error_log file contains the following messages:
ApacheJServ/1.0: An error occurred listening to the port:
java.lang.OutOfMemoryError
[Mon Oct 11 16:16:48 1999] [error] [client xxx.xx.xx.xxx] Premature end of
script headers: /servlet/TestServlet
[Mon Oct 11 16:16:48 1999] [error] [client xxx.xx.xx.xxx] Premature end of
script headers: /servlet/TestServlet
The jserv_log contains the following messages:
[11/10/1999 16:16:48:129] (ERROR) an error returned handling request via
protocol "ajpv11"
[11/10/1999 16:16:48:138] (EMERGENCY) ajp11: cannot scan servlet headers
[11/10/1999 16:16:48:138] (ERROR) an error returned handling request via
protocol "ajpv11"
[11/10/1999 16:16:48:141] (EMERGENCY) ajp11: can not connect to host
127.0.0.1:8007
[11/10/1999 16:16:48:141] (EMERGENCY) ajp11: connection fail
[11/10/1999 16:16:48:141] (ERROR) an error returned handling request via
protocol "ajpv11"
[11/10/1999 16:16:48:143] (EMERGENCY) ajp11: can not connect to host
127.0.0.1:8007
[11/10/1999 16:16:48:143] (EMERGENCY) ajp11: connection fail
The http.conf file contains the following important lines:
<IfModule mod_jserv.c>
ApJServManual off
ApJServSecretKey /usr/local/apache/conf/jserv.secret.key
ApJServProperties /usr/local/apache/conf/jserv.properties
ApJServLogFile /export/www/logs/jserv.log
ApJServMount /servlet /servlet
</IfModule>
The jserv.properties-file looks as follows:
wrapper.bin=/usr/bin/java
wrapper.bin.parameters=-ms80m -mx128m
wrapper.class=org.apache.jserv.JServ
wrapper.classpath=/usr/local/jserv/lib/ApacheJServ.jar
wrapper.classpath=/usr/local/jsdk-2.0/lib/jsdk.jar
wrapper.classpath=/projects/xxx
wrapper.classpath=/projects/xxx/mail.jar
wrapper.classpath=/projects/xxx/activation.jar
wrapper.classpath=/projects/xxx/jdbc/lib/classes111.zip
wrapper.env=LD_LIBRARY_PATH=/usr/local/lib
port=8007
zones=servlet
servlet.properties=/usr/local/apache/conf/jserv.servlet.properties
security.maxConnections=50
security.authentication=true
security.secretKey=/usr/local/apache/conf/jserv.secret.key
security.challengeSize=5
log=false
log.file=/usr/local/apache/logs/jserv.trace
log.timestamp=true
log.dateFormat=[dd/MM/yyyy HH:mm:ss:SSS zz]
I am using the following machines:
1. The HTTP server machine:
Sun Enterprise 250 (1 CPU; 512 MB RAM; 2 mirrored SCSI disks) with Solaris
2.7
Apache 1.3.9 with JServ 1.0 module, JSDK 2.0, JDK 1.1.6
2. The DB machine:
Oracle 8.1.5 RDBMS, connections via JDBC port 1521 (thin-client)
Has anybody a clue, how to fix this problem??
Thanx
Ulrich
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