PK97780: EDGESTATISTICS RESETS TO 0 DURING HEAVY LOAD

Fixes are available

APAR status

Closed as program error.

Error description

EDGESTATISTICS Resets to 0 during heavy load.  Turning on
com.ibm.ws.cache.*=all: com.ibm.ws.esi.channel.*=all tracing
shows

Trace: 2009/08/24 11:16:46.870 01 t=8C65A0 c=UNK key=S2
(13007002)
   ThreadId: 00000033
   FunctionName: com.ibm.ws.esi.channel.ESIChannelLink
   SourceId: com.ibm.ws.esi.channel.ESIChannelLink
   Category: FINEST
   ExtendedMessage: ZAioTCPChannel: sync read operation timed
   out.
 java.io.IOException: ZAioTCPChannel: sync read operation timed
   out.
   at
com.ibm.ws.tcp.channel.impl.ZAioTCPReadRequestContextImpl.read
(ZAioTCPReadRequestContextImpl.java:227)

...

com.ibm.ws.cache.esi.ESIInvalidatorCollector.run
(ESIInvalidatorCollector.java:53)
  at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)

Local fix

Increase the read time out in the HTTPChannel for the
WCInboundDefault and the WCInboundDefaultSecure channel chains
from the default of 60 seconds to 180 seconds.

1. Click Servers > Server Types > WebSphere application servers
   >server_name. Then in the Container Settings section, click
   Web container Settings > Web container transport chains.
2. Select the normal inbound chain for serving requests. This
   chain is typically called WCInboundDefault, and listens on
   port 9080.
3. Click HTTP Inbound Channel (HTTP_2).
4. Enter 120 for the Read Timeout.

AND increase the timeout from the default of 5 to 20 for the
ESInvalidator by defining the custom JVM Property:

private.com.ibm.ws.cache.esi.ESIInvalidator.socket.timeout=20

http://publib.boulder.ibm.com/infocenter/wasinfo/v6r1/index.jsp?
topic=/com.ibm.websphere.zseries.doc/info/zseries/ae/
xrun_jvm.html

Click System Administration >  Application servers >
Java and process management > Process definition > Control >
Java

Also set the timeout for the servant region.

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V6.1.0 using Edge Side Include       *
*                  (ESI) caching.                              *
****************************************************************
* PROBLEM DESCRIPTION: ESI statistics when viewed through      *
*                      the cache monitor are reset to zero     *
*                      under heavy load.                       *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
During high performance situations responses from the plug-in
may not be received or processed prior to channel and the ESI
invalidator timeouts expiring.  This causes the connection
between the application server and plug-in to terminate and
all ESI counters are reset.

Problem conclusion

Increasing channel and ESI invalidator timeouts will prevent
delays in receiving responses from resetting ESI counters and
keep the connection active.

Increase the read time out in the HTTPChannel for the
WCInboundDefault and the WCInboundDefaultSecure channel chains
from the default of 60 seconds to 180 seconds.  Increase the
timeout from the default of 5 to 20 for the ESI invalidator by
defining the custom JVM Property:

private.com.ibm.ws.cache.esi.ESIInvalidator.socket.timeout=20

APAR PK97780 is currently targeted for inclusion in Service
Level (Fix Pack) 6.1.0.31 of WebSphere Application Server V6.1.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

Temporary fix

Comments

APAR Information

APAR number
PK97780
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-10-02
Closed date
2009-10-23
Last modified date
2010-06-03

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

PM08141

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R610 PSY UK56378
UP10/05/08 P F005

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 December 2021

Tips

PK97780: EDGESTATISTICS RESETS TO 0 DURING HEAVY LOAD

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R610 PSY UK56378

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

Document Information

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