Port scanning crashed JBossMQ

[jukkalehti]

Hello all,

I downloaded JBossMQ from (is this the latest version, btw?)

http://prdownloads.sourceforge.net/jboss/jbossmq-1.0.0-Beta-1.zip

and installed it to my RedHat Linux 7.2/SUN JRE 1.3.1. It was running fine until I performed port scan against the server. When scanning the OIL and UIL ports, an exception is thrown and after that the service is not responding:

[OILServerILService] Could not initialize the OILServerIL Service.
java.io.StreamCorruptedException: Caught EOFException while reading the stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:845)
at java.io.ObjectInputStream.(ObjectInputStream.java:168)
at org.jboss.mq.il.oil.OILServerILService.run(OILServerILService.java:182)
at java.lang.Thread.run(Thread.java:484)
[UILServerILService] Could not initialize the UILServerIL Service.
java.io.StreamCorruptedException: Caught EOFException while reading the stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:845)
at java.io.ObjectInputStream.(ObjectInputStream.java:168)
at org.jboss.mq.il.uil.UILServerILService.run(UILServerILService.java:187)
at java.lang.Thread.run(Thread.java:484)

The port scanner I used is available for Linux at:

http://www.ricksoft.co.uk/downloads/portscan/portscan.htm

The same problem seems to be with JBossMQ from JBoss-2.4.3.zip, too.

[jukkalehti]

Anybody?

If this is a known problem or documented somewhere, a pointer to TFM would be just fine.

[hchirino]

This seems like a weird one.. Can you consistently reproduce it??

Regards,
Hiram

[jukkalehti]

Yes, here's how to reproduce it under Linux:

download the jbossmq from the link above, unzip, 'cd' to jbossmq-1.0.0-Beta-1/bin and say 'sh run.sh'.

Then, download the portscanner from the link above,
untar it, and use the binary "ports". (You can also compile it by yourself, but before you do a 'make', you have to remove "struct timeval" definition from the top of ports.cpp.)

Then just scan those ports used by OIL and UIL, and you'll get the exceptions (during the first scan, after that, you can't get no response at all from those ports, even if sending some valid messages).

I tried this now also with SUN's J2RE-1.4.0-beta2-linux
and with it I got:

[OILServerILService] Could not initialize the OILServerIL Service.
java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2138)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2607)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:721)
at java.io.ObjectInputStream.(ObjectInputStream.java:252)
at org.jboss.mq.il.oil.OILServerILService.run(OILServerILService.java:182)
at java.lang.Thread.run(Thread.java:539)

[UILServerILService] Could not initialize the UILServerIL Service.
java.net.SocketException: Connection reset by peer: Connection reset by peer
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:119)
at java.net.SocketInputStream.read(SocketInputStream.java:147)
at java.io.DataInputStream.readShort(DataInputStream.java:323)
at org.jboss.mq.il.uil.multiplexor.StreamDemux.pumpData(StreamDemux.java:120)
at org.jboss.mq.il.uil.multiplexor.DemuxInputStream.read(DemuxInputStream.java:87)
at org.jboss.mq.il.uil.multiplexor.DemuxInputStream.read(DemuxInputStream.java:122)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:186)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:225)
at java.io.BufferedInputStream.read(BufferedInputStream.java:280)
at java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2123)
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2136)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2607)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:721)
at java.io.ObjectInputStream.(ObjectInputStream.java:252)
at org.jboss.mq.il.uil.UILServerILService.run(UILServerILService.java:187)
at java.lang.Thread.run(Thread.java:539)

[jukkalehti]

One more addition: the same exception is also thrown if I use JBoss-2.4.3.zip. (unzip, cd, sh run.sh)

[charlesc]

The exception is quite okay... actually. The only problem with the code is that once an exception is raised, we should not stop the service.

This can be easily fixed by applying the following fix to OILServerILService.java (CVS version):

171d170
< running = false;

Good luck,
Charles

[charlesc]

This is now fixed in CVS.

Charles

[jukkalehti]

Hi,

I just build jboss-mq from CVS and the problem is fixed!

Thanks a lot!

PS. FYI:

/tmp/jboss-mq/server/output/classes
/tmp/jboss-mq/server/src/main/org/jboss/util/timeout/TimeoutFactory.java:248: warning: as of release 1.4, assert is a keyword, and may not be used as an identifier
private void assert(boolean expr)
^