{"action":"created","issue":{"url":"https://api.github.com/repos/dpkp/kafka-python/issues/571","repository_url":"https://api.github.com/repos/dpkp/kafka-python","labels_url":"https://api.github.com/repos/dpkp/kafka-python/issues/571/labels{/name}","comments_url":"https://api.github.com/repos/dpkp/kafka-python/issues/571/comments","events_url":"https://api.github.com/repos/dpkp/kafka-python/issues/571/events","html_url":"https://github.com/dpkp/kafka-python/issues/571","id":137204852,"number":571,"title":"help:OffsetCommit failed for group XXX due to group error","user":{"login":"abc100m","id":4769764,"avatar_url":"https://avatars.githubusercontent.com/u/4769764?v=3","gravatar_id":"","url":"https://api.github.com/users/abc100m","html_url":"https://github.com/abc100m","followers_url":"https://api.github.com/users/abc100m/followers","following_url":"https://api.github.com/users/abc100m/following{/other_user}","gists_url":"https://api.github.com/users/abc100m/gists{/gist_id}","starred_url":"https://api.github.com/users/abc100m/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/abc100m/subscriptions","organizations_url":"https://api.github.com/users/abc100m/orgs","repos_url":"https://api.github.com/users/abc100m/repos","events_url":"https://api.github.com/users/abc100m/events{/privacy}","received_events_url":"https://api.github.com/users/abc100m/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2016-02-29T09:55:58Z","updated_at":"2016-03-02T02:13:07Z","closed_at":null,"body":"while running producer send test with key, the consumer  output some error message:\r\n\r\n```python\r\n[2016-02-29 17:20:56,243] [ERROR] [Thread-2] OffsetCommit failed for group XXX due to group error (IllegalGenerationError - 22 - Returned from group membership requests (such as heartbeats) when the generation id provided in the request is not the current generation.), will rejoin\r\n[2016-02-29 17:20:56,787] [ERROR] [Thread-2] OffsetCommit failed for group XXX due to group error (IllegalGenerationError - 22 - Returned from group membership requests (such as heartbeats) when the generation id provided in the request is not the current generation.), will rejoin\r\n```\r\n\r\nthe consumer can still work\r\n\r\nI mentioned there is a similar issue #498, and it's fixed.  after upgraded from 1.0 to 1.01 and also to 1.02-dev,  my test script still output the error message.\r\n\r\nso, what's this message mean?  does it make some wrong?\r\n"},"comment":{"url":"https://api.github.com/repos/dpkp/kafka-python/issues/comments/191019584","html_url":"https://github.com/dpkp/kafka-python/issues/571#issuecomment-191019584","issue_url":"https://api.github.com/repos/dpkp/kafka-python/issues/571","id":191019584,"user":{"login":"abc100m","id":4769764,"avatar_url":"https://avatars.githubusercontent.com/u/4769764?v=3","gravatar_id":"","url":"https://api.github.com/users/abc100m","html_url":"https://github.com/abc100m","followers_url":"https://api.github.com/users/abc100m/followers","following_url":"https://api.github.com/users/abc100m/following{/other_user}","gists_url":"https://api.github.com/users/abc100m/gists{/gist_id}","starred_url":"https://api.github.com/users/abc100m/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/abc100m/subscriptions","organizations_url":"https://api.github.com/users/abc100m/orgs","repos_url":"https://api.github.com/users/abc100m/repos","events_url":"https://api.github.com/users/abc100m/events{/privacy}","received_events_url":"https://api.github.com/users/abc100m/received_events","type":"User","site_admin":false},"created_at":"2016-03-02T02:13:07Z","updated_at":"2016-03-02T02:13:07Z","body":"here is the detail message, can u see something wrong?\r\n\r\n```python\r\n[2016-03-01 22:07:03,859] [ERROR] [Thread-7] OffsetCommit failed for group XXXXXXXXXX due to group error (IllegalGenerationError - 22 - Returned from group membership requests (such as heartbeats) when the generation id provided in the request is not the current generation.), will rejoin\r\n[2016-03-01 22:07:03,861] [WARNING] [Thread-7] Auto offset commit failed: IllegalGenerationError - 22 - Returned from group membership requests (such as heartbeats) when the generation id provided in the request is not the current generation.\r\n[2016-03-01 22:07:04,404] [ERROR] [Thread-7] OffsetCommit failed for group XXXXXXXXXX due to group error (IllegalGenerationError - 22 - Returned from group membership requests (such as heartbeats) when the generation id provided in the request is not the current generation.), will rejoin\r\n[2016-03-01 22:07:04,404] [WARNING] [Thread-7] Offset commit failed: group membership out of date This is likely to cause duplicate message delivery.\r\n[2016-03-01 22:07:04,407] [INFO] [Thread-7] Attempt to join group XXXXXXXXXX failed due to unknown member id, resetting and retrying.\r\n[2016-03-01 22:07:04,449] [INFO] [Thread-7] Joined group 'XXXXXXXXXX' (generation 1) with member_id kafka-python-1.0.0-eb393873-5a7e-4584-bf37-b0f8320d06b3\r\n[2016-03-01 22:07:04,450] [INFO] [Thread-7] Elected group leader -- performing partition assignments using roundrobin\r\n[2016-03-01 22:07:04,492] [INFO] [Thread-7] Updated partition assignment: [TopicPartition(topic=u'XXXXXXXXXX', partition=0), TopicPartition(topic=u'XXXXXXXXXX', partition=1)]\r\n```"}}