A fix is available
APAR status
Closed as program error.
Error description
Running CICS with Liberty, the following error is repeatedly issued to the Liberty messages.log file: javax.resource.spi.RetryableUnavailableException: limit for number of MessageEndpoint proxies reached. Limit = 500 After this point the JVM is no longer able to process any CICS LINK requests. The log file contained numerous NullPointerExceptions where the application was failing (500 errors in total). Eventually the JVM had to be recycled to allow the application to continue processing.
Local fix
n/a
Problem summary
**************************************************************** * USERS AFFECTED: All CICS Users. * **************************************************************** * PROBLEM DESCRIPTION: The maximum number of MessageEndpoint * * proxies is reached, resulting in all * * subsequent EXEC CICS LINKs to Liberty * * applications to fail. * **************************************************************** If an exception is thrown in a Link to Liberty application, the CICS Link Listener does not clean up properly. If this happens 500 times the following exception occurs: javax.resource.spi.RetryableUnavailableException: limit for number of MessageEndpoint proxies reached. Limit = 500 The Link Listener Service becomes unavailable and all EXEC CICS LINKs to Liberty applications will fail with INVREQ, RESP2=53.
Problem conclusion
CICSMessageWorker.java has been changed so that the Message Endpoint is released when an exception is thrown. PH14856 resolves this problem in CICS 5.5.
Temporary fix
Comments
APAR Information
APAR number
PH17013
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
10D
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-09-17
Closed date
2019-12-18
Last modified date
2020-03-05
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI67090 UI67091
Modules/Macros
DFJ@H467
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
Fix is available
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Document Information
Modified date:
05 March 2020