We have a problem in Transactional replication. The problem is that I have mismatch number of rows between the publisher and the subscription. We have Transactional replication in SQL2012 Enterprise edition SP3
- Publication – Standalone server
- Subscription – AlwaysOn server (Push)
- Distribution – 3rd server Standalone
The Publisher/Subscriber combination have several publication that all work fine except 1. The problematic publication has one table. The table has a column with XML Data type, size – 260GB, 5.5 Millions rows.
The data is not being replicated to the subscriber; Undistributed commands show 919382 and counting. I think the problem probably in the distribution server.
The repl process try to exec sys.sp_MSget_repl_commands;1 and wait for PREEMPTIVE_OS_WAITFORSINGLEOBJEC. I found that by using sp_whoisactive.
We get error message in distribution job:
Raised events that occur when an agent’s reader thread waits longer than the agent's -messageinterval time. (By default, the time is 60 seconds.) If you notice State 2 events that are recorded for an agent, this indicates that the agent is taking a long time to write changes to the destination.
In addition there are no database locks. Please advise how to solve the problem. Thanks & Regards.