Costin Manolache wrote:
In jk2, all those strings are eliminated ( from C side ), we also eliminateAh! I understand now what you meant by "single-threaded". It does sound like a better option.
the buffer allocation ( we reuse the same jbyteArray and C array, with
code to eventually support NIO - that cuts 2 memcpy and few other small
things ). We also reduce the number of JNI calls to a minimum ( or almost ).
Regarding the single-threaded behavior - I think this is a major benefit
for JNI ( or doors ) workers, since it can avoid thread switching and a lot
of synchronization. In all other protocol there are 2 threads sending data
to each other. This won't be visible for a small number of RPS, but I expect it to be important for very high loads. Well - most likely this
is just a benchmarking exercise - if the servlets are doing anything usefull
they'll dominate the execution time anyway, the connector overhead is already extremely small.
You just need to port the nstomcat module to jk2.Exactly what I am doing. I have all AOLserver JK2 C code (simingly!) in place, and after fixing some things in workers2/jk2.properties I can see the worker attempt to communicate with AJP connector on port 8009:
jk1 doesn't support tomcat4 in-process, jk2 does. From the connector
point of view it doesn't matter what tomcat is run ( at one point
it even detected the tomcat version at runtime - all it cares is to
have coyote/jk2 available and have a class with main() ).
jk_channel_socket.c:328:channelSocket.open() connect failed localhost:8009 146 Connection refused
I think above is due to Tomcat failing to initialize properly when in-process. It does listen on 8009 when I launch it from command line.
Did you get the connector to work with sockets ? ( i.e tomcat out
of process ) ? That's the first step, you need this to work well
to test the aol-specific code.
Yes. Works perfectly well, leaves nothing suspicious in the logs.
You can configure a different starter ( TomcatStarter did work with an older version of BootstrapService - now you can't useI see o.a.jk.apr.TomcatStarter.main() call o.a.catalina.startup.BootstrapService.main(). I didn't think of changing the bootstrap class. I see the followin "candidates":
the 4.1 version of BS without daemon ). You can probably try
to just configure it to use o.a.catalina.startup.Bootstrap.
( or a different starter with a main() )
org/apache/catalina/startup/Bootstrap.class
org/apache/catalina/startup/BootstrapService.class
org/apache/catalina/startup/CatalinaService.class
org/apache/catalina/startup/Catalina.class
org/apache/catalina/startup/Embedded.class
Unfortunately the link to Catalina Javadocs off is broken on the jakarta.apache.org Website. I'll browse through the Java sources, butwould be helpful if anyone could mention which bootstrap class I could use in place of TomcatStarter
A related question - what does this log entry mean? I think it is related to [worker.jni:onShutdown] entry in workers2.properties.
jk_worker_jni.c:369:jni.init() disabling the non init hook worker
Thanks,
Alex
::::::::::::::
stderr.log
::::::::::::::
TomcatStarter: main()
Try org.apache.tomcat.startup.Main
Try org.apache.catalina.startup.BootstrapService
Starting org.apache.catalina.startup.BootstrapService
java.lang.NullPointerException
at org.apache.catalina.startup.BootstrapService.start(BootstrapService.java:244)
at org.apache.catalina.startup.BootstrapService.main(BootstrapService.java:307)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.jk.apr.TomcatStarter.run(TomcatStarter.java:127)
at java.lang.Thread.run(Thread.java:484)
Created catalinaLoader in: /<deleted -
AL>/jakarta-tomcat-4.1.12/server/lib
[INFO] Registry - -Loading registry information
[INFO] Registry - -Creating new Registry instance
[INFO] Registry - -Creating MBeanServer
[INFO] Http11Protocol - -Initializing Coyote HTTP/1.1 on port 8089
java.lang.ArrayIndexOutOfBoundsException
at org.apache.catalina.startup.BootstrapService.main(BootstrapService.java:305)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.jk.apr.TomcatStarter.run(TomcatStarter.java:127)
at java.lang.Thread.run(Thread.java:484)
java.lang.ArrayIndexOutOfBoundsException
at org.apache.jk.apr.TomcatStarter.run(TomcatStarter.java:131)
at java.lang.Thread.run(Thread.java:484)
::::::::::::::
stdout.log
::::::::::::::
Bootstrap: Starting service
TomcatStarter: Done
TomcatStarter: Done
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