PQ58462: DATASHARING=0 CAUSE ACTIVATE HANG IN SYSPLEX ENV

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APAR status
Closed as program error.

Error description
When attempting to do an activate of a new conversation in
a multi-system environment, a hang condition was encountered.
It turned out that the customer had turned off DATASHARING
in their environment file and WebSphere did not know about
the servers on the other system when trying to locate an
object in one of those servers.
A hang condition is an inappropriate response
A bit of output that might help identify the issue is:
08 17:59:28.340 01 SYSTEM=ROSE SERVER=SYSMGT01 JobName=PBOSMS
 ASID=0X0093 PID=0X04010078 TID=0X28CEF000 0X000018 c=12.1
 ./bbocsess.cpp+4342 ... BBOU0639E Function connect() failed wit
 RV=-1, RC=1116, RSN=766303FF,  EDC8116I Address not
 available. hostname/ip: 163.231.162.25  port:
.
note the blank port value.
Local fix
Set DATASHARING=1 to resolve this issue.
Problem summary
****************************************************************
* USERS AFFECTED: All users of WebSphere Application Server    *
*                 V4.0.1 for z/OS and OS/390.                  *
****************************************************************
* PROBLEM DESCRIPTION: Server region hangs if outbound locate  *
*                      fails in the Control Region             *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
An outbound locate request from a Server region did not receive
a response. The comm_outbound_locate routine (bboocomm.cpp) is
waiting the Server region thread for a response.  It had built
and queued an ACRW into the Control region for
ACRW_TYPE_OUTBOUND_LOCATE_REQUEST.

In the control region routine comm_outbound_locate module
(bboocomm.cpp) sent the locate request to the local daemon.
The daemon could not find the target Server, it responded with
a partially built IOR to cause a failure on the next locate
forward request (only done for WebSphere internal objects).
The returned IOR had a port of 0 in all the protocol tags.
Method comm_inbound_response handles the locate response
returned from the daemon.  When it attempted a locate on the new
IOR it received from the daemon it encountered the comm error:
"Function connect() failed with RV=-1, RC=1116, RSN=766303FF."

Method comm_inbound_response does not have logic to account for
this failure.  It assumes that an asynchronous response will
arrive for the call made to comm_outbound_locate.  Thus, when
it returns to the WebSphere execution thread (bbooboat.cpp),
there is no indication that this locate request is done.  The
execution thread assumes that another locate request was issued
and that the server region thread must continue to wait for the
outcome.  There is no outstanding locate request, therefore the
server region thread is hung.
Problem conclusion
Code has been modified in routine comm_inbound_response module
bboocomm.cpp to propagate an indication of a
comm_outbound_locate failure back to the execution thread
(bbooboat.cpp).  The execution thread,
ACR_ExecutionThread::RemoveAndProcessWork, will cause the post
of the server region thread in this event.

APAR PQ58462 is associated with SERVICE LEVEL W401033 of
WebSphere Application Server V4.0.1 for z/OS and OS/390.
Temporary fix Comments
APAR information
APAR number PQ58462
Reported component name WASKBASE
Reported component ID 5655A9801
Reported release 401
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Submitted date 2002-02-27
Closed date 2002-03-20
Last modified date 2002-04-02

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:
UQ64351

Modules/Macros
BBOOCOMM BBOUBINF        

Fix information
Fixed component name WASKBASE
Fixed component ID 5655A9801

Applicable component levels
R401 PSY UQ64351    UP02/03/29 P F203

  Fix is available
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Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 401
Software edition:
Reference #: PQ58462
IBM Group: Software Group
Modified date: Apr 2, 2002