PI85184: LOAD BALANCER FOR IPV4 AND IPV4 EXPERIENCES DELAYS INVOKING GO SCRIPTS

Fixes are available

APAR status

Closed as program error.

Error description

Load Balancer for IPv4 and IPv6 has a delay invoking go
scripts when a takeover occurs in high availability
configurations.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server Load       *
*                  Balancer for IPv4 and IPv6 with high        *
*                  availability                                *
****************************************************************
* PROBLEM DESCRIPTION: During a takeover, invocation of the    *
*                      go scripts may be delayed up to 10      *
*                      seconds.                                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The delay invocation of the go scripts can increase cluster
outage if required configuration occurs in the go scripts.
Normally this is not an issue since the go scripts typically
only report that a takeover has occurred.

Problem conclusion

The high availability monitor periodcally queries the high
availability status to determine if a takeover has occurred.
This polling interval was non-configurable and defined to
occur every 10 seconds. With this change, the polling will
occur every 3 seconds and can be configured using the custom
property LB_HA_INTERVAL.

To set the custom property, add -DLB_HA_INTERVAL="<value"> to
the dsserver script java call which invokes
SRV_KNDConfigServer (typcially the last java call in the
script) and restart the load balancer for the setting to take
effect. You can verify the interval setting in the
output at the beginning of the hamon.log

Fix levels:
   8.5.5.13
   9.0.0.6

Temporary fix

Comments

APAR Information

APAR number
PI85184
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-07-31
Closed date
2017-08-10
Last modified date
2017-08-10

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
WS EDGE LB IPV4
Fixed component ID
5724H8812

Applicable component levels

R850 PSY
UP
R900 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"900","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
03 May 2022

Tips

PI85184: LOAD BALANCER FOR IPV4 AND IPV4 EXPERIENCES DELAYS INVOKING GO SCRIPTS

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

R850 PSY

R900 PSY

Document Information

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