Hi, I don't have the previous logs, so I restarted MM2, that produces the same results. So new logs:
MM2 starts and seems to be ready, but not mirroring message: [2020-03-20 10:50:11,985] INFO [Producer clientId=connector-producer-MirrorCheckpointConnector-0] Cluster ID: 700ZEsu0ShuzPZ6lZE54_Q (org.apache.kafka.clients.Metadata) [2020-03-20 10:50:19,927] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) It takes another 5 minutes of just the usually "committing offsets" kinda messages (these are all the logs MM2 prints at that time) [2020-03-20 10:50:19,927] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:19,927] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:19,936] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 9 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,634] INFO WorkerSourceTask{id=MirrorSourceConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,635] INFO WorkerSourceTask{id=MirrorSourceConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,636] INFO WorkerSourceTask{id=MirrorSourceConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,636] INFO WorkerSourceTask{id=MirrorSourceConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,639] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,639] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:50:57,650] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 11 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:11,886] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:11,886] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:11,886] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:11,886] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:11,886] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:11,886] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:11,887] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:11,887] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:19,936] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:19,936] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:19,941] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 5 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,635] INFO WorkerSourceTask{id=MirrorSourceConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,635] INFO WorkerSourceTask{id=MirrorSourceConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,636] INFO WorkerSourceTask{id=MirrorSourceConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,636] INFO WorkerSourceTask{id=MirrorSourceConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,651] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,651] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:51:57,658] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 7 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,886] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,886] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,933] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Finished commitOffsets successfully in 47 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,933] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,933] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,965] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Finished commitOffsets successfully in 32 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,965] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,965] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,997] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Finished commitOffsets successfully in 32 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,997] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:11,997] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:12,026] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Finished commitOffsets successfully in 29 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:19,941] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:19,941] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:19,946] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 5 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,635] INFO WorkerSourceTask{id=MirrorSourceConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,635] INFO WorkerSourceTask{id=MirrorSourceConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,637] INFO WorkerSourceTask{id=MirrorSourceConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,637] INFO WorkerSourceTask{id=MirrorSourceConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,658] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,658] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:52:57,666] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 8 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:11,933] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:11,933] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:11,988] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Finished commitOffsets successfully in 55 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:11,988] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:11,988] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:12,027] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Finished commitOffsets successfully in 39 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:12,027] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:12,027] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:12,067] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Finished commitOffsets successfully in 40 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:12,067] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:12,067] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:12,102] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Finished commitOffsets successfully in 35 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:19,946] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:19,946] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:19,950] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 4 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,636] INFO WorkerSourceTask{id=MirrorSourceConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,636] INFO WorkerSourceTask{id=MirrorSourceConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,637] INFO WorkerSourceTask{id=MirrorSourceConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,637] INFO WorkerSourceTask{id=MirrorSourceConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,667] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,667] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:53:57,682] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 15 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:11,988] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:11,988] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,036] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Finished commitOffsets successfully in 48 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,036] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,036] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,067] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Finished commitOffsets successfully in 31 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,067] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,067] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,101] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Finished commitOffsets successfully in 34 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,102] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,102] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:12,134] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Finished commitOffsets successfully in 32 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:19,951] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:19,951] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:19,955] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 4 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,636] INFO WorkerSourceTask{id=MirrorSourceConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,636] INFO WorkerSourceTask{id=MirrorSourceConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,637] INFO WorkerSourceTask{id=MirrorSourceConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,637] INFO WorkerSourceTask{id=MirrorSourceConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,638] INFO WorkerSourceTask{id=MirrorSourceConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,639] INFO WorkerSourceTask{id=MirrorSourceConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,682] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,682] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:54:57,690] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 8 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,036] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,036] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,068] INFO WorkerSourceTask{id=MirrorCheckpointConnector-1} Finished commitOffsets successfully in 32 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,068] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,068] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,099] INFO WorkerSourceTask{id=MirrorCheckpointConnector-2} Finished commitOffsets successfully in 31 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,102] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,102] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,138] INFO WorkerSourceTask{id=MirrorCheckpointConnector-3} Finished commitOffsets successfully in 36 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,138] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,138] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:12,169] INFO WorkerSourceTask{id=MirrorCheckpointConnector-0} Finished commitOffsets successfully in 31 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:19,955] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:19,955] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:19,960] INFO WorkerSourceTask{id=MirrorHeartbeatConnector-0} Finished commitOffsets successfully in 5 ms (org.apache.kafka.connect.runtime.WorkerSourceTask) [2020-03-20 10:55:31,729] INFO [Consumer clientId=consumer-14, groupId=null] Subscribed to partition(s): ... and then subscribes to the topics and starts to mirror message: [2020-03-20 10:55:31,729] INFO [Consumer clientId=consumer-14, groupId=null] Subscribed to partition(s): ... [2020-03-20 10:55:31,731] INFO Starting with 303 previously uncommitted partitions. (org.apache.kafka.connect.mirror.MirrorSourceTask) [2020-03-20 10:55:31,732] INFO [Consumer clientId=consumer-14, groupId=null] Seeking to offset 180324042 for partition ... There isn't any logs with "x took too long (y ms)" or "timed out running task x"? Only some "x took y ms", but all of them during the startup and it does not seem to be a reason for the 5 minute delay: [2020-03-20 10:49:13,980] INFO Reflections took 1443 ms to scan 92 urls, producing 4486 keys and 18097 values [using 2 cores] (org.reflections.Reflections) [2020-03-20 10:49:14,986] INFO Reflections took 653 ms to scan 92 urls, producing 4486 keys and 18097 values [using 2 cores] (org.reflections.Reflections) [2020-03-20 10:49:16,059] INFO Reflections took 618 ms to scan 92 urls, producing 4486 keys and 18097 values [using 2 cores] (org.reflections.Reflections) [2020-03-20 10:49:19,929] INFO creating internal topics took 13 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:20,997] INFO creating internal topics took 10 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:57,637] INFO creating internal topics took 21 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:57,658] INFO creating upstream offset-syncs topic took 29 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:57,658] INFO creating internal topics took 33 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:57,680] INFO loading initial consumer groups took 21 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:57,953] INFO loading initial set of topic-partitions took 295 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:57,964] INFO creating downstream topic-partitions took 10 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:57,980] INFO refreshing known target topics took 15 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:49:57,981] INFO Starting MirrorSourceConnector took 367 ms. (org.apache.kafka.connect.mirror.MirrorSourceConnector) [2020-03-20 10:49:58,442] INFO syncing topic configs took 461 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:07,316] INFO Stopping MirrorSourceConnector took 6051 ms. (org.apache.kafka.connect.mirror.MirrorSourceConnector) [2020-03-20 10:50:07,329] INFO creating upstream offset-syncs topic took 9 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:07,395] INFO loading initial set of topic-partitions took 66 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:07,397] INFO creating downstream topic-partitions took 2 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:07,412] INFO refreshing known target topics took 15 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:07,412] INFO Starting MirrorSourceConnector took 95 ms. (org.apache.kafka.connect.mirror.MirrorSourceConnector) [2020-03-20 10:50:07,430] INFO creating internal topics took 13 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:07,448] INFO creating internal topics took 13 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:07,457] INFO loading initial consumer groups took 8 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:07,844] INFO syncing topic configs took 432 ms (org.apache.kafka.connect.mirror.Scheduler) [2020-03-20 10:50:09,755] INFO Stopping DistributedHerder-connect-1 took 922 ms. (org.apache.kafka.connect.mirror.MirrorCheckpointTask) [2020-03-20 10:50:10,749] INFO Stopping DistributedHerder-connect-1 took 994 ms. (org.apache.kafka.connect.mirror.MirrorCheckpointTask) [2020-03-20 10:50:10,755] INFO Stopping DistributedHerder-connect-1 took 6 ms. (org.apache.kafka.connect.mirror.MirrorCheckpointTask) [2020-03-20 10:50:11,749] INFO Stopping DistributedHerder-connect-1 took 994 ms. (org.apache.kafka.connect.mirror.MirrorCheckpointTask) [2020-03-20 10:50:11,859] INFO Stopping task-thread-MirrorCheckpointConnector-3 took 3 ms. (org.apache.kafka.connect.mirror.MirrorCheckpointTask) [2020-03-20 10:50:11,861] INFO Stopping task-thread-MirrorCheckpointConnector-2 took 7 ms. (org.apache.kafka.connect.mirror.MirrorCheckpointTask) [2020-03-20 10:50:11,861] INFO Stopping task-thread-MirrorCheckpointConnector-0 took 5 ms. (org.apache.kafka.connect.mirror.MirrorCheckpointTask) [2020-03-20 10:50:11,862] INFO Stopping task-thread-MirrorCheckpointConnector-1 took 6 ms. (org.apache.kafka.connect.mirror.MirrorCheckpointTask) Peter On Wed, 18 Mar 2020 at 15:12, Ryanne Dolan <ryannedo...@gmail.com> wrote: > Peter, can you share any log lines like "x took y ms" or "x took too long > (y ms)" or "timed out running task x"? > > Ryanne > > On Tue, Mar 17, 2020 at 10:45 AM Péter Sinóros-Szabó > <peter.sinoros-sz...@transferwise.com.invalid> wrote: > > > Hey, > > > > Running a MM2 cluster to mirror from A->B clusters I noticed that when I > > add a new topic to A cluster, MM2 will notice it: > > [2020-03-17 13:14:05,477] INFO Found 2719 topic-partitions on main. 1 are > > new. 0 were removed. Previously had 2718. > > (org.apache.kafka.connect.mirror.MirrorSourceConnector) > > > > That's fine. It seems that MM2 connectors just simply restart to start up > > with the new configuration. > > My problem is that it takes about 5 minutes for MM2 to start to mirror > > messages again. > > > > What I see in the logs are: > > [2020-03-17 13:14:07,107] INFO Kafka startTimeMs: 1584450847106 > > (org.apache.kafka.common.utils.AppInfoParser) > > [2020-03-17 13:14:07,204] INFO [Producer clientId=producer-11] Cluster > ID: > > wif2mnkZTayzAEOb2VyoLA (org.apache.kafka.clients.Metadata) > > > > It seems that MM2 restarts the connectors in 2 seconds. > > But then I see the usual logs, but according to MM2's metrics, it is not > > mirroring any messages for about 5 minutes. > > > > [2020-03-17 13:14:10,485] INFO > > WorkerSourceTask{id=MirrorCheckpointConnector-3} Committing offsets > > (org.apache.kafka.connect.runtime.WorkerSourceTask) > > [2020-03-17 13:14:10,485] INFO > > WorkerSourceTask{id=MirrorCheckpointConnector-3} Committing offsets > > (org.apache.kafka.connect.runtime.WorkerSourceTask) > > [2020-03-17 13:14:10,485] INFO > > WorkerSourceTask{id=MirrorCheckpointConnector-3} flushing 0 outstanding > > messages for offset commit > > (org.apache.kafka.connect.runtime.WorkerSourceTask) > > [2020-03-17 13:14:10,485] INFO > > WorkerSourceTask{id=MirrorCheckpointConnector-3} flushing 0 outstanding > > messages for offset commit > > (org.apache.kafka.connect.runtime.WorkerSourceTask) > > [2020-03-17 13:14:10,637] INFO > > WorkerSourceTask{id=MirrorCheckpointConnector-3} Finished commitOffsets > > successfully in 152 ms > (org.apache.kafka.connect.runtime.WorkerSourceTask) > > [2020-03-17 13:14:10,637] INFO > > WorkerSourceTask{id=MirrorCheckpointConnector-3} Finished commitOffsets > > successfully in 152 ms > (org.apache.kafka.connect.runtime.WorkerSourceTask) > > > > So after ~5 minutes, I see that it is subscribing to the topics... and I > > also see in the metrics that that is the time when it starts to mirror > > messages. > > > > [2020-03-17 13:19:39,850] INFO [Consumer clientId=consumer-39, > > groupId=null] Subscribed to partition(s): ... > > [2020-03-17 13:19:39,851] INFO Starting with 308 previously uncommitted > > partitions. (org.apache.kafka.connect.mirror.MirrorSourceTask) > > [2020-03-17 13:19:39,851] INFO [Consumer clientId=consumer-39, > > groupId=null] Seeking to offset 178508243 for partition > > twTasks.austrac-service.executeTask.default-0 (org.apache.kafka > > > > > > Is there any idea how to speed this up? > > > > Thanks, > > Peter > > >