SSL socket connected between two java processes on multi-core servers, in
which the client side is constantly sending data. Architecture on the client
side is such that there are separate threads reading and writing to the same
socket. If the server side of the connection drops, the client side
deadlocks most (not all - it is obviously a race) of the time. From looking
at the thread dump it appears that if the client is performing a send during
the time the connection is dropping the deadlock occurs.

The deadlock appears to be between Threads 3902 which is doing an
AppInputStream read which immediately encounters an exception in
SSLSocketImpl which results in the SSLSocketImpl object being locked,
followed by an attempt to lock ReentrantLock$NonfairSync@41f8f72f.
The other thread id in question is 22, which is doing a send via an
AppOutputStream which ultimately ends up locking
ReentrantLock$NonfairSync@41f8f72f. and then trying to grab the lock on
the SSLSocketImpl object... i.e. the reverse order. A close does happen
to be going on at the same time, but that thread (64) is simply blocked
on the SSLSocketImpl object as well... i.e. it did not grab any locks of
interest.

The problem did not
exist in 1.6 update 33, but got introduced between updates 34 and 37...
and the problem still exists in update 45.

system configuration
====================
Attaching to process ID 2997, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 20.45-b01
Java System Properties:

platform = linux
db.userdata.file = /var/mcp/run/MCP_18.0/AM1_0/data/.dbuserdata
foundation.debug.port = 12300
user.timezone = Europe/Moscow
ne.mgmt.basePort = 12300
ne.name = AM1
db.host = 192.168.209.212
ne.instance.id = 0

VM Flags:

-XX:NewSize=8m -XX:MaxNewSize=8m -XX:+UseParNewGC -XX:MaxTenuringThreshold=0
-Xms88m -Xmx88m -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=68
-XX:+UseCMSInitiatingOccupancyOnly -XX:+UseMembar -XX:+PrintClassHistogram
-XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF8
-DpropFile=../data/neprops.tx