48369 - deadlock at deregisterConnection

Status: RESOLVED FIXED

(Directory Graveyard :: LDAP Java SDK, defect, P3)

Description

[Gudrun.Brunsch]

we use LDAP classes 3.1
under heavy load we get the following trace from jrun:

A SIGQUIT has been received. Do you want to:

  [ 0 ]  continue program

  [ 1 ]  check & print one deadlock

  [ 2 ]  check & print all deadlocks

  [ 3 ]  dump thread stacks

  [ 4 ]  dump lock registry

  [ 5 ]  heap inspection

  [ 6 ]  terminate program

Type number corresponding to selected action: 

FOUND A JAVA LEVEL DEADLOCK:

---------------------------

t@24 waiting to lock object@0xdb1f1458:"netscape/ldap/LDAPConnThread"

	 which is locked by t@1674

t@1674 waiting to lock object@0xdb0b1908:"netscape/ldap/LDAPConnection"
	
                    which is locked by t@24


JAVA STACK INFORMATION FOR THREADS LISTED ABOVE:

-----------------------------------------------


Java Stack for t@24 (EE = 0x4a6208) "Session Killer" :

==========

[1] netscape.ldap.LDAPConnThread.deregister(LDAPConnection.java)

[2] netscape.ldap.LDAPConnection.deregisterConnection(LDAPConnection.java)

[3] netscape.ldap.LDAPConnection.disconnect(LDAPConnection.java)

[4] DirXServletHelpers.DirXFunctions.disconnect(Unknown Source)

[5] DirXServletHelpers.SessionInfo.freeSession(Unknown Source)

[6] DirXServletHelpers.Worker.deleteSession(Unknown Source)

[7] DirXServletHelpers.Worker.deleteTimedOutSessionsAndConnections(Unknown Source)

[8] DirXServletHelpers.SessionKiller.run(Unknown Source)

[9] java.lang.Thread.run(Thread.java:485)


Java Stack for t@1674 (EE = 0x7c2850) "Thread-1450" :

==========

[1] netscape.ldap.LDAPConnection.deregisterConnection(LDAPConnection.java)

[2] netscape.ldap.LDAPConnThread.cleanUp(LDAPConnection.java)

[3] netscape.ldap.LDAPConnThread.networkError(LDAPConnection.java)

[4] netscape.ldap.LDAPConnThread.run(LDAPConnection.java)

-----------------------------------------------
Found 1 deadlock

Comment 1

[Mark Smith [:mcs]]

Reassigned LDAP JDK bug to Miodrag.

Comment 2

[miodrag]

There is a known problem and was fixed in ldapjdk 4.x. Plase try the latest 
release.