Hi, we use two AG unified push servers with Oracle DB in cluster, but we have some problem with deadlock (probably caused by clean up by both servers at the same time).

We used DB owner PUSHSRVAG and application DB account APUSHSRVAG.

(version ... my fork (with small change in dev) ... https://github.com/IvanGurtler/aerogear-unifiedpush-server/tree/MyBranch)

Is possible change some settings to prevent deadlock ? or some different solution ?

-----------------------------------------------------------------------------------------

*** 2015-04-10 00:00:04.506

*** SESSION ID:(84.48937) 2015-04-10 00:00:04.506

*** CLIENT ID:() 2015-04-10 00:00:04.506

*** SERVICE NAME:(SYS$USERS) 2015-04-10 00:00:04.506

*** MODULE NAME:(JDBC Thin Client) 2015-04-10 00:00:04.506

*** CLIENT DRIVER:(jdbcthin) 2015-04-10 00:00:04.506

*** ACTION NAME:() 2015-04-10 00:00:04.506

 

 

*** 2015-04-10 00:00:04.506

DEADLOCK DETECTED ( ORA-00060 )

See Note 60.1 at My Oracle Support for Troubleshooting ORA-60 Errors

[Transaction Deadlock]

 

The following deadlock is not an ORACLE error. It is a

deadlock due to user error in the design of an application

or from issuing incorrect ad-hoc SQL. The following

information may aid in determining the deadlock:

 

Deadlock graph:

                                                                               ---------Blocker(s)--------                ---------Waiter(s)---------

Resource Name                                              process session holds waits                process session holds waits

TM-00013891-00000000-00000000-00000000        142      84    SX   SSX                       144     162    SX   SSX

TM-00013891-00000000-00000000-00000000        144     162    SX   SSX                       142      84    SX   SSX

 

 

Rows waited on:

  Session 84: no row

  Session 162: no row

 

----- Information for the OTHER waiting sessions -----

Session 162:

  sid: 162 ser: 54036 audsid: 10790094 user: 115/APUSHSRVAG

    flags: (0x41) USR/- flags_idl: (0x1) BSY/-/-/-/-/-

    flags2: (0x40009) -/-/INC

  pid: 144 O/S info: user: oracle, term: UNKNOWN, ospid: 11534420

    image: oracle@s16000ks

  client details:

    O/S info: user: jbotp, term: unknown, ospid: 1234

    machine: s1.sk.srv.acc.sys program: JDBC Thin Client

    application name: JDBC Thin Client, hash value=2546894660

  current SQL:

  delete from PUSHSRVAG.PushMessageInformation where submitDate<:1 

 

----- End of information for the OTHER waiting sessions -----

 

Information for THIS session:

 

----- Current SQL Statement for this session (sql_id=bsk109wpq55yg) -----

delete from PUSHSRVAG.PushMessageInformation where submitDate<:1