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Steps to Reproduce:

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1. Cluster mode, tow node (container);
2. Offset topic only have 1 partition;
3. Create multi mysql connector; (at least 3)
4. Change data, all connector have offset recored in partition 0.
4. Increate offset topic partition number to 3. (at least 3)
5. Change data, and some connector store their offset recored to partition 1 or partition 2.
6. Restart all connect container, all connector read offset from partition 0.
7. Then, repeat data in some connector topic (stored offset to partition 1 or partition 2).

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1. Cluster mode, tow node (container); 2. Offset topic only have 1 partition; 3. Create multi mysql connector; (at least 3) 4. Change data, all connector have offset recored in partition 0. 4. Increate offset topic partition number to 3. (at least 3) 5. Change data, and some connector store their offset recored to partition 1 or partition 2. 6. Restart all connect container, all connector read offset from partition 0. 7. Then, repeat data in some connector topic (stored offset to partition 1 or partition 2).

After running for a while that offset topic only had 1 partition.

Increase partition number to 3, then, some connector store theirs offset to partition 1 or partition 2.

All connector will get offset recored from partition 0 when restart all container.