Bidirectional replication of cache groups to cache

Question

We setup a Bidirectional replication of AWT cache groups to AWT cache groups.
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create asynchronous writethrough cache group T1_CACHE from T1
     a NUMBER(12) NOT NULL,
     b NUMBER(12),
     c NUMBER(12),
     PRIMARY KEY (a)
CREATE REPLICATION rep.mytt
ELEMENT a DATASTORE
MASTER mydata ON "ser1"
SUBSCRIBER mydata ON "ser2" RETURN TWOSAFE
ELEMENT b DATASTORE
MASTER mydata ON "cx_pdscp2"
SUBSCRIBER mydata ON "cx_pdscp1" RETURN TWOSAFE;
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I write a application.It forks 30 child process and insert values into t1.The replication between the master and subscriber is ok, but the replication agent of master to Oracle can not work well. After 3~5 minutes, it print the log:
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19:15:15.13 Err : REP: 6359: MYDATA:receiver.c(5668): TT16038: Failed to begin transaction for caller: rxBegin
Tx()
19:15:15.13 Err : REP: 6359: MYDATA:receiver.c(5668): TT864: TT0864: Operation prohibited with an active trans
action -- file "dbAPI.c", lineno 3822, procedure "sb_xactBeginQ()"
19:15:15.13 Err : REP: 6359: MYDATA:receiver.c(5002): TT16187: Transaction 1187176202/995; Error: transient 1,
permanent 0
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Pls help me! Thanks!

Answer 1

Hi,
This configuration is not supported; you can configure a bi-directional 2-safe scheme without AWT (as long as you only use it in a logical active/standby fashion).
If you want to achieve high availability using 2-safe replication and AWT then you must use the explicit ACTIVE STANDBY pair replication (you will need TimesTen 7.0 to do this). This fully supports the combination of 2-safe replication and AWT.
Regards, Chris