IT30411: IBM SSH SERVER'S SESSION CAN COME DOWN

Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• When using Data Server Manager (DSM) a Job might fail because
  the SSH Server's session comes down.
  
  The Job Manager Log could show an exception like this:
  
  JobManagerLogger    (39571)    Aug 23, 2019 7:55:01 AM    ERROR
  JSchException in run() of DB2CLPRunner
  com.jcraft.jsch.JSchException: session is down
      at com.jcraft.jsch.Session.openChannel(Session.java:861)
      at
  com.ibm.datatools.shared.services.util.ssh.SSHUtility.recordOSTy
  pe(SSHUtility.java:361)
      at
  com.ibm.datatools.shared.services.util.ssh.SSHUtility.connectSSH
  Session(SSHUtility.java:332)
      at
  com.ibm.datatools.shared.services.util.ssh.SSHUtility.connectToH
  ost(SSHUtility.java:395)
      at
  com.ibm.datatools.jobmanager.execution.DB2CLPRunner.connectAndEx
  ecuteCommands(DB2CLPRunner.java:294)
      at
  com.ibm.datatools.jobmanager.execution.DB2CLPRunner.executeComma
  nds(DB2CLPRunner.java:225)
      at
  com.ibm.datatools.jobmanager.execution.DB2CLPRunner.run(DB2CLPRu
  nner.java:99)
      at
  com.ibm.datatools.sqwruntime.taskmgr.core.impl.TaskRunner.run(Ta
  skRunner.java:54)
      at java.lang.Thread.run(Thread.java:785)
  
  
  A mini-dump can get generated as well for the SSH Server that
  produces the following stack:
  
  sshd_worker!do_spawn+0x7e7
  sshd_worker!do_exec_no_pty+0x188
  sshd_worker!do_exec+0x15e
  sshd_worker!session_exec_req+0x74
  sshd_worker!session_input_channel_req+0xeb
  sshd_worker!server_input_channel_req+0x12f
  sshd_worker!dispatch_run+0x6c
  sshd_worker!server_loop2+0x14b
  sshd_worker!do_authenticated+0x3b
  sshd_worker!main+0xff1
  sshd_worker!__tmainCRTStartup+0x144
  kernel32!BaseThreadInitThunk+0x14
  ntdll!RtlUserThreadStart+0x21
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * all                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * upgrade to 11.4.6                                            *
  ****************************************************************
  

Problem conclusion

• upgrade to v11.4.6
  

Temporary fix

Comments

APAR Information

• 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

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels