Have you looked at https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-Whyaretheremanyrebalancesinmyconsumerlog ?
Thanks, Jun On Tue, Dec 17, 2013 at 9:24 AM, Drew Goya <d...@gradientx.com> wrote: > Hey all, > > I've recently been having problems with consumer groups rebalancing. I'm > using several high level consumers which all belong to the same group. > Occasionally one or two of them will get stuck in a rebalance loop. They > attempt to rebalance, but the partitions they try to claim are owned. > Anyone run into this? Ideas? > > I see errors in my zookeeper logs like: > > 2013-12-17 17:12:31,171 [myid:001] - INFO [ProcessThread(sid:1 > cport:-1)::PrepRequestProcessor@627] - Got user-level KeeperException when > processing sessionid:0x342e4febc180852 type:create cxid:0x1a9a > zxid:0x501390d4b txntype:-1 reqpath:n/a Error > Path:/kafka/consumers/trackingGroup/owners/Events2/25 Error:KeeperErrorCode > = NodeExists for /kafka/consumers/trackingGroup/owners/Events2/25 > > And errors in my kafka logs like: > > 2013-12-17 17:20:32 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], begin > rebalancing consumer > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306 try #8 > > 2013-12-17 17:20:33 ConsumerFetcherManager [INFO] > [ConsumerFetcherManager-1387249530381] Stopping leader finder thread > > 2013-12-17 17:20:33 ConsumerFetcherManager [INFO] > [ConsumerFetcherManager-1387249530381] Stopping all fetchers > > 2013-12-17 17:20:33 ConsumerFetcherManager [INFO] > [ConsumerFetcherManager-1387249530381] All connections stopped > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Cleared all > relevant queues for this fetcher > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Cleared the > data chunks in all the consumer message iterators > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Committing > all offsets after clearing the fetcher queues > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Releasing > partition ownership > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Consumer > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306 rebalancing the > following partitions: List(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, > 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, > 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, > 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, > 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, > 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, > 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, > 122, 123, 124, 125, 126, 127) for topic Events2 with consumers: > List(trackingGroup_prod-storm-sup-trk001-1387249529775-2a8484f1-0, > trackingGroup_prod-storm-sup-trk001-1387249529775-2a8484f1-1, > trackingGroup_prod-storm-sup-trk002-1387249530831-97c586ab-0, > trackingGroup_prod-storm-sup-trk002-1387249530831-97c586ab-1, > trackingGroup_prod-storm-sup-trk003-1387249529739-f2de3dd9-0, > trackingGroup_prod-storm-sup-trk003-1387249529739-f2de3dd9-1, > trackingGroup_prod-storm-sup-trk004-1387249530445-8f57ec5c-0, > trackingGroup_prod-storm-sup-trk004-1387249530445-8f57ec5c-1, > trackingGroup_prod-storm-sup-trk005-1387249530451-d59c669a-0, > trackingGroup_prod-storm-sup-trk005-1387249530451-d59c669a-1, > trackingGroup_prod-storm-sup-trk005-1387249530452-2b244683-0, > trackingGroup_prod-storm-sup-trk005-1387249530452-2b244683-1, > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-0, > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-1, > trackingGroup_prod-storm-sup-trk007-1387249529436-fb79e4c8-0, > trackingGroup_prod-storm-sup-trk007-1387249529436-fb79e4c8-1, > trackingGroup_prod-storm-sup-trk008-1387249526700-11ba655b-0, > trackingGroup_prod-storm-sup-trk008-1387249526700-11ba655b-1, > trackingGroup_prod-storm-sup-trk009-1387249530020-cb36831c-0, > trackingGroup_prod-storm-sup-trk009-1387249530020-cb36831c-1, > trackingGroup_prod-storm-sup-trk010-1387249529975-d43aff06-0, > trackingGroup_prod-storm-sup-trk010-1387249529975-d43aff06-1, > trackingGroup_prod-storm-sup-trk011-1387249527684-479a04f9-0, > trackingGroup_prod-storm-sup-trk011-1387249527684-479a04f9-1, > trackingGroup_prod-storm-sup-trk012-1387249530208-155ecd68-0, > trackingGroup_prod-storm-sup-trk012-1387249530208-155ecd68-1, > trackingGroup_prod-storm-sup-trk013-1387249530700-b323ee53-0, > trackingGroup_prod-storm-sup-trk013-1387249530700-b323ee53-1, > trackingGroup_prod-storm-sup-trk014-1387249529916-e32e6363-0, > trackingGroup_prod-storm-sup-trk014-1387249529916-e32e6363-1, > trackingGroup_prod-storm-sup-trk015-1387249529709-d655ccd4-0, > trackingGroup_prod-storm-sup-trk015-1387249529709-d655ccd4-1, > trackingGroup_prod-storm-sup-trk016-1387249531064-bc8f8f3e-0, > trackingGroup_prod-storm-sup-trk016-1387249531064-bc8f8f3e-1, > trackingGroup_prod-storm-sup-trk017-1387249530635-35f505b7-0, > trackingGroup_prod-storm-sup-trk017-1387249530635-35f505b7-1, > trackingGroup_prod-storm-sup-trk018-1387249530621-84327f5f-0, > trackingGroup_prod-storm-sup-trk018-1387249530621-84327f5f-1, > trackingGroup_prod-storm-sup-trk019-1387249530418-80afccf9-0, > trackingGroup_prod-storm-sup-trk019-1387249530418-80afccf9-1, > trackingGroup_prod-storm-sup-trk020-1387249530930-906e99e1-0, > trackingGroup_prod-storm-sup-trk020-1387249530930-906e99e1-1, > trackingGroup_prod-storm-sup-trk021-1387249529761-705a5bca-0, > trackingGroup_prod-storm-sup-trk021-1387249529761-705a5bca-1, > trackingGroup_prod-storm-sup-trk022-1387249530347-3d40b4f9-0, > trackingGroup_prod-storm-sup-trk022-1387249530347-3d40b4f9-1, > trackingGroup_prod-storm-sup-trk023-1387249529067-957d280b-0, > trackingGroup_prod-storm-sup-trk023-1387249529067-957d280b-1, > trackingGroup_prod-storm-sup-trk024-1387249530625-f8118f02-0, > trackingGroup_prod-storm-sup-trk024-1387249530625-f8118f02-1, > trackingGroup_prod-storm-sup-trk025-1387249530213-cccfffc8-0, > trackingGroup_prod-storm-sup-trk025-1387249530213-cccfffc8-1, > trackingGroup_prod-storm-sup-trk046-1387249527798-2164c569-0, > trackingGroup_prod-storm-sup-trk046-1387249527798-2164c569-1, > trackingGroup_prod-storm-sup-trk047-1387249530559-6b49ce74-0, > trackingGroup_prod-storm-sup-trk047-1387249530559-6b49ce74-1, > trackingGroup_prod-storm-sup-trk048-1387249529976-aba1e428-0, > trackingGroup_prod-storm-sup-trk048-1387249529976-aba1e428-1, > trackingGroup_prod-storm-sup-trk050-1387249530465-dc203a62-0, > trackingGroup_prod-storm-sup-trk050-1387249530465-dc203a62-1, > trackingGroup_prod-storm-sup-trk051-1387249530406-46f7a649-0, > trackingGroup_prod-storm-sup-trk051-1387249530406-46f7a649-1, > trackingGroup_prod-storm-sup-trk052-1387249530423-e06e4210-0, > trackingGroup_prod-storm-sup-trk052-1387249530423-e06e4210-1, > trackingGroup_prod-storm-sup-trk054-1387249530369-68e494e6-0, > trackingGroup_prod-storm-sup-trk054-1387249530369-68e494e6-1, > trackingGroup_prod-storm-sup-trk055-1387249529961-bec0abbc-0, > trackingGroup_prod-storm-sup-trk055-1387249529961-bec0abbc-1, > trackingGroup_prod-storm-sup-trk056-1387249531590-957c0b49-0, > trackingGroup_prod-storm-sup-trk056-1387249531590-957c0b49-1, > trackingGroup_prod-storm-sup-trk057-1387249530341-d8476874-0, > trackingGroup_prod-storm-sup-trk057-1387249530341-d8476874-1, > trackingGroup_prod-storm-sup-trk058-1387249530730-20554b4d-0, > trackingGroup_prod-storm-sup-trk058-1387249530730-20554b4d-1) > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-0 attempting to > claim partition 24 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-0 attempting to > claim partition 25 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-1 attempting to > claim partition 26 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-1 attempting to > claim partition 27 > > 2013-12-17 17:20:33 ZkUtils$ [INFO] conflict in > /consumers/trackingGroup/owners/Events2/25 data: > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-0 stored data: > trackingGroup_prod-storm-sup-trk007-1387249529436-fb79e4c8-0 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], waiting for > the partition ownership to be deleted: 25 > > 2013-12-17 17:20:33 ZkUtils$ [INFO] conflict in > /consumers/trackingGroup/owners/Events2/26 data: > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-1 stored data: > trackingGroup_prod-storm-sup-trk007-1387249529436-fb79e4c8-1 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], waiting for > the partition ownership to be deleted: 26 > > 2013-12-17 17:20:33 ZkUtils$ [INFO] conflict in > /consumers/trackingGroup/owners/Events2/24 data: > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-0 stored data: > trackingGroup_prod-storm-sup-trk007-1387249529436-fb79e4c8-0 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], waiting for > the partition ownership to be deleted: 24 > > 2013-12-17 17:20:33 ZkUtils$ [INFO] conflict in > /consumers/trackingGroup/owners/Events2/27 data: > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306-1 stored data: > trackingGroup_prod-storm-sup-trk007-1387249529436-fb79e4c8-1 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], waiting for > the partition ownership to be deleted: 27 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], end > rebalancing consumer > trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306 try #8 > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Rebalancing > attempt failed. Clearing the cache before the next rebalancing operation is > triggered > > 2013-12-17 17:20:33 ConsumerFetcherManager [INFO] > [ConsumerFetcherManager-1387249530381] Stopping leader finder thread > > 2013-12-17 17:20:33 ConsumerFetcherManager [INFO] > [ConsumerFetcherManager-1387249530381] Stopping all fetchers > > 2013-12-17 17:20:33 ConsumerFetcherManager [INFO] > [ConsumerFetcherManager-1387249530381] All connections stopped > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Cleared all > relevant queues for this fetcher > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Cleared the > data chunks in all the consumer message iterators > > 2013-12-17 17:20:33 ZookeeperConsumerConnector [INFO] > [trackingGroup_prod-storm-sup-trk006-1387249530327-9d15c306], Committing > all offsets after clearing the fetcher queues >
