MDEV-30516 : Assertion `wsrep_cluster_address[0]' failed in void wsre… #510
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…p_create_rollbacker() In wsrep_cluster_address_update there is possibility of race condition if two connections concurrently set wsrep_cluster_address. Concurrent change is possible because stopping replication requires to unlock LOCK_global_system_variables mutex. Fix is to use existing local variable tmp containing set wsrep_cluster_address on also when creating rollbacker threads. This variable is set when mutex to LOCK_global_system_variables is still held.
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…p_create_rollbacker()
In wsrep_cluster_address_update there is possibility of race condition if two connections concurrently set wsrep_cluster_address. Concurrent change is possible because stopping replication requires to unlock LOCK_global_system_variables mutex.
Fix is to use existing local variable tmp containing set wsrep_cluster_address on also when creating rollbacker threads. This variable is set when mutex to
LOCK_global_system_variables is still held.