APAR status
Closed as program error.
Error description
The MQ listener process terminates. The executable runmqlsr disappears from the list of running processes. These messages show up in EMS: MQ message: AMQ9219: The TCP/IP listener program could not create a new connection for the incoming conversation. EXPLANATION : An attempt was made to create a new socket because an attach request was received, but an error occurred. ACTION : The failure may be transitory, try again later. If the problem persists, record the return code 4120 and tell the systems administrator. It may be necessary to free some jobs or restart the communications system. MQ message: AMQ5027: The listener 'LISTENER' has ended. ProcessId(4,2206 ¢X1TR 1442846886). EXPLANATION : The listener process has ended. ACTION : None. You may find following FDC on your system if the listener termination has been caused by a port scanner: | Probe Id :- CO618000 | Component :- cciInvalidDataReceived | Program Name :- amqrmppa | Thread :- 9 RemoteResponder | Major Errorcode :- rrcE_BAD_DATA_RECEIVED | Minor Errorcode :- OK | Probe Type :- MSGAMQ9207 | Probe Severity :- 2 | Probe Description :- AMQ9207: The data received from host | 'XX.XXX.XXX.XXX' on channel '????' is not valid. | FDCSequenceNumber :- 0 | Comment1 :- XX.XXX.XXX.XXX (IP address) | Comment2 :- TCP/IP MQM Function Stack ccxResponder rrxResponder rriAcceptSess ccxReceive cciTcpReceive cciInvalidDataReceived xcsFFST
Local fix
The customer needs to restart the listener. The customer could check if he used a port scanner for security tests. The port scanner could have caused the connection reset.
Problem summary
The connection reset condition (ECONNRESET error) is unhandled in the MQ listener code. The listener runs the default handling which is error reporting (FDC, EMS) and termination.
Problem conclusion
An error handling (network socket recreate) has been implemented for error condition ECONNRESET with listen() and accept(). --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v8.1 8.1.0.11 The latest available maintenance can be obtained from 'Recommended Fixes for IBM MQ' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available information on its planned availability can be found in 'IBM MQ planned maintenance release dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
The only known root cause for this problem are port scanner tests. The customer should be aware that listener processes may terminate due to these tests.
Comments
APAR Information
APAR number
IT41772
Reported component name
MQ FOR HPE NS O
Reported component ID
5724A3904
Reported release
810
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2022-08-15
Closed date
2022-08-15
Last modified date
2022-08-15
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
MQ FOR HPE NS O
Fixed component ID
5724A3904
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"810","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
15 August 2022