Fixes are available
8.5.5.2: WebSphere Application Server V8.5.5 Fix Pack 2
8.5.5.3: WebSphere Application Server V8.5.5 Fix Pack 3
8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21
APAR status
Closed as program error.
Error description
Netstat shows the Liberty Server has opened up a listener that is not defined. It is bound to an ephemeral port and localhost An example of this is SVR1 00007B46 Listen Local Socket: ::ffff:127.0.0.1..1547 Foreign Socket: ::ffff:0.0.0.0..0
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server Liberty Profile * **************************************************************** * PROBLEM DESCRIPTION: WebSphere Application Server Liberty * * Profile servers open up an ephemeral * * port, which may be undesirable, * **************************************************************** * RECOMMENDATION: * **************************************************************** WebSphere Application Server Liberty Profile servers open up an ephemeral command port for the purposes of communication with the server script. The ephemeral port is necessary in order for the server script to perform certain functions against a running server, such as stopping the server or requesting a Java dump. The opening of ephemeral ports can be surprising, particulary for users who run frequent port scans on their system and are continually surprised to find open ports that they were unaware of.
Problem conclusion
The command port is unnecessary for WebSphere Application Server for z/OS Liberty Profile servers that are started as a started task, because z/OS operator console commands can be used to perform most tasks that the server script can perform. In this environment, the command port has been disabled by default, and new z/OS operator console commands were added so that all function provided by the server script is now also provided by z/OS operator console commands. In all other environments, the server will still open an ephemeral command port by default. However, a new bootstrap property "command.port" has been provided that can be used to specify a specific port number to use for the command port. The fix for this APAR is currently targeted for inclusion in fix pack 8.5.5.2. 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
PM89272
Reported component name
LIBERTY - Z/OS
Reported component ID
5655W6514
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2013-05-17
Closed date
2013-08-27
Last modified date
2013-10-02
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
LIBERTY - Z/OS
Fixed component ID
5655W6514
Applicable component levels
R850 PSY
UP
Document Information
Modified date:
28 April 2022