JRun Connector Errors

Question

We've migrated from ColdFusion MX 6.1 to 8 recently and we're
seeing an alarming number of error messages like these:
Server Error
The server encountered an internal error and was unable to
complete your request.
JRun Connector Protocol Error.
We're running:
Cold Fusion 8,0,1,195765 64-Bit
Solaris 10
Apache 2.2.10
JRun Connector mod_jrun22.so
JDK 1.5.0_16 (we downgraded the JVM as a potential fix)
Oracle JDBC drivers 11.1.0.6.0 for JDK 5 (we need Oracle 11g
database support)
We've spent several days investigating this now. The only
patterns seem to be that:
-happens a little bit more after a server restart
-can return the error very quickly on random pages
-but can also return the error on pages that are running big
queries and take a long time to run
-very inconsistent, we can call the same page multiple times
at once - some requests fail, others succeed
-we are also seeing a lot of java.io.EOFException errors in
our cfserver.log with stack traces of some kind
-the logs don't point in any parcticular direction, nor do
the JRun Connector errors seem to coincide with any logs entries
What we've tried to do to fix this:
-Tried the built-in Adobe Oracle database drivers
-Tried the JDK 5 version of the Oracle 11.1.0.6.0 database
drivers
-Downgraded the JVM used by Cold Fusion 8 to JDK 5.
-Adjusted the data source connection pools timeouts; turned
off Maintain Connections altogether just to see if it made a
difference
-Adjusted template caching settings
-Tweaked the 3 or 4 JRun Connector timeout settings in
Apache. Also turned on verbose mode on the JRun Connector to see if
that revealed anything. Saw a few suspicious entries, such as:
jrApache[init] 127.0.0.1:51800 destroying/closing socket [35]
error 0
jrApache[init] jrCloseSocket [35]
But these did not parallel all of the JRun connector errors
we've been seeing.
-Tried connecting to only one database node at a time (we
have an Oracle cluster)
-Verified our JDBC connection string
-Tried reproducing this error under previous Cold Fusion 6.1
production servers and in development environment, but didn't have
any luck
-Even tried cleaning up the linebreak characters in some of
our code after vi complained about "premature end of file" or
"premature end of line" - no luck.
We're pulling our hair out at this point. The only other
thing we've suspected is a firewall or loadbalancer issue causing
us to lose connections. HELP!!!!

Answer 1

Hello,
we also have got the same error and also very sporadic.
We're running:
Cold Fusion 8,0,1 32-Bit
Window 2003 Server
Apache 2.0.63
JRun Connector mod_jrun20.so
JDK 1.6.0_04
ms sqlserver 2005
on VMWare
The error occures on different installations and different
machines. allways on vmware.
when it happens nothing helps any more.
- restarting apache - no effect
- restarting jrun - no effect
- restarting both - no effect
- killing all apache and jrun processes and restart - no
effect
and the system does not recover by itself.
only restarting the vmware helps...
sometimes even the jdbc connection to our mssqlserver 2005
ist not available anymore.
message: socket write error.
seems to be something very deep in the system, but we could
not figure out what.
we got the same
"destroying/closing socket"
error in our apache log files.
seems to happen more often if cpu is on load, or if more
threads are running but we are not able to reproduce it at all...
help please!