PI58311: TRAS0120W message reports incorrect lost events

Fixes are available

APAR status

Closed as program error.

Error description

Logstash collector interacts with an internal Liberty
feature, collector manager to collect log events. Collector
manager has the ability to detect events lost when the
Logstash collector is not able to consume events at the rate
at which they are being produced by the relevant sources. A
warning message is issued when the event loss is first
detected. The number of lost events in this message doesn't
accurately reflect the actual number of lost events.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server Liberty Profile - Debug/Tracing      *
****************************************************************
* PROBLEM DESCRIPTION: Logstash collector feature reports      *
*                      incorrect lost events.                  *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Logstash collector loses events when it is not able to consume
the events at the rate at which they are being produced by the
relevant source. Internally these events are stored in buffers
to accommodate some slowness in event consumption. However, a
source that produces a large volume of events ends up
overwriting these buffers, which means events might be lost
before the logstash collector can consume them. When this
happens, the feature will issue a warning message to the user
with the number of lost events. Due to a bug in the buffer
management logic the reported number is not correct.

Problem conclusion

The buffer management logic was fixed to report the correct
number of lost events.

The fix for this APAR is currently targeted for inclusion in fix
pack 16.0.0.2.  Please refer to the Recommended Updates page for
delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI58311
Reported component name
WAS LIBERTY COR
Reported component ID
5725L2900
Reported release
855
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-03-01
Closed date
2016-03-09
Last modified date
2016-06-13

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
WAS LIBERTY COR
Fixed component ID
5725L2900

Applicable component levels

R855 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSD28V","label":"WebSphere Application Server Liberty Core"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"855","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
03 May 2022

Tips

PI58311: TRAS0120W message reports incorrect lost events

Fixes are available

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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

R855 PSY

Document Information

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