PI22008: RDZ V8036 INTERNAL DEFECTS AND ENHANCEMENTS - OPENRSE

APAR status

• Closed as program error.

Error description

• RDZ V8036 INTERNAL DEFECTS AND ENHANCEMENTS - OPENRSE
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: 01.RDz 8* users                              *
  *                 02.RDz server administrators who have DNS    *
  *                    issues on their servers and RDz users     *
  *                    who are concerned with too many           *
  *                    unnecessary log files.                    *
  *                 03.RDz Users who use USS symbolic links      *
  *                 04.z/OS system administrator                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: 01.During a disconnect, it's possible   *
  *                         for a deadlock to occur.             *
  *                      02.When DNS settings are messed up, an  *
  *                         NPE can occur with the server        *
  *                         without a useful error message and   *
  *                         .dstoreHashmap log entries can take  *
  *                         up a lot of space.                   *
  *                      03.Deleting a symbolic link for a       *
  *                         folder from RSE deletes the folder   *
  *                         contents.                            *
  *                      04.RDz enhancement to allow TLS v1.2    *
  *                         usage                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  01.When an RDz user disconnects from the server, it is possible
     (although rare) for the timing to be such that a deadlock
     can occur. In such scenarios, this can also result in locked
     datasets.
  02.If a z/OS machine hasn't properly configured their DNS
     settings, an NPE can occur with the server. While there is
     already a workaround for this scenario, there is no message
     indicating to the administrator what might have gone wrong.
     The second issue is that .dstoreHashmap files can get
     frequently created in some scenarios and these files aren't
     very useful to users.
  03.Deleting a symbolic link for a folder from RSE deletes the
     folder contents.
  04.Rational Developer for System z enhancement to allow TLS
     v1.2 usage. To use TLS v1.2, define
     _RSE_JAVAOPTS="$_RSE_JAVAOPTS
     -DDSTORE_SSL_ALGORITHM=TLSv1.2" in rsed.envvars (host), and
     -DDSTORE_SSL_ALGORITHM=TLSv1.2 in eclipse.ini (client).
  

Problem conclusion

• 01.In order to avoid the deadlock, a synchronized block in the
     server code was removed. This is a change that had already
     gone into the RDz 9* versions.
  02.The RSE server will attempt to fall back to reading the
     hostname via a shell command. If that fails then, a error
     message will indicate a problem and suggest the workaround.
     For .dstoreHashmap log entries will not get created by
     default and older ones will be deleted after a two days.
  03.When a user deletes a symbolic link for a folder, the
     contents are not deleted.
  04.Rational Developer for System z enhancement to allow TLS
     v1.2 usage. To use TLS v1.2, define
     _RSE_JAVAOPTS="$_RSE_JAVAOPTS
     -DDSTORE_SSL_ALGORITHM=TLSv1.2" in rsed.envvars (host), and
     -DDSTORE_SSL_ALGORITHM=TLSv1.2 in eclipse.ini (client).
  

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:

Modules/Macros

• FEKFDST0 FEKFDST2
  

Fix information

• Fixed component name

  RD/Z HOST

• Fixed component ID

  5724T0723

Applicable component levels

• R801 PSY UI26951

     UP15/04/30 I 1000

Fix is available

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