Date: Mon, 13 Dec 2004 16:59:07 +0100 From: Joris Verschoor <j.verschoor@nefli.nl> To: freebsd-java@freebsd.org Subject: FreeBSD 5.3-RELEASE + JDK1.4 native in a Jail -> hangs 99% cpu on kserel Message-ID: <41BDBC4B.40505@nefli.nl>
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Hello,
I've installed a 5.3-RELEASE box. I haven't changed anything from the
default kernel.
The box is a single cpu P4 with HT disabled.
I've set some sysctl vars:
security.jail.sysvipc_allowed: 1 (for pg in a jail)
There are 2 jails on my box:
1) Java 1.4.2 native port + resin3
2) PostgreSQL-7(.4)
PostgreSQL runs fine (I think)
I've installed a webapp on resin3 using the pg jdbc drivers. Everything
runs fine and dandy, but after a while, I suddenly get two things:
******** 1 ********
And exception while opening a connection to pg.
Caused by: org.postgresql.util.PSQLException:
An I/O error occured while reading from backend
Exception: java.net.SocketException: Resource temporarily unavailable
Stack Trace:
java.net.SocketException: Resource temporarily unavailable
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
... etc
******** 2 ********
the java process runs on 98% in the kserel state.
When it's in this state it won't serve any requests.
It is killable (killall -9 java and the perl wrapper).
I'm still not sure if nr 2 happens because of nr 1.
I haven't tried green threads yet.
Is this a known problem, and if so, what can I do to resolve it?
What does problem 1 mean?
Is this a problem caused by java(jailed) or pg(jailed)?
What is state is kserel?
Is there anything I can do to provide more information, for example a
dump when it's stuck?
Thanks
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