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https://issues.apache.org/jira/browse/KAFKA-4477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15734018#comment-15734018
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James Cheng commented on KAFKA-4477:
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Does the broker respond to metadata requests (kafkacat -L)?
You said that for the topics the broker owns, that the ISRs shrink down to just
itself. Does the broker exist in the ISR for topics that are owned by other
brokers?
If you see the broker disconnect and then reconnect from zookeeper very
quickly, I'm wondering if this might be an instance of KAFKA-1120, which might
be the same as KAFKA-4443. When I've encountered those bugs, what I've seen is
a broker that answers metadata queries fine, but is not being followed by any
other brokers, and is not following any other brokers.
> Node reduces its ISR to itself, and doesn't recover. Other nodes do not take
> leadership, cluster remains sick until node is restarted.
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-4477
> URL: https://issues.apache.org/jira/browse/KAFKA-4477
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 0.10.1.0
> Environment: RHEL7
> java version "1.8.0_66"
> Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
> Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)
> Reporter: Michael Andre Pearce (IG)
> Assignee: Apurva Mehta
> Priority: Critical
> Labels: reliability
> Attachments: kafka.jstack
>
>
> We have encountered a critical issue that has re-occured in different
> physical environments. We haven't worked out what is going on. We do though
> have a nasty work around to keep service alive.
> We do have not had this issue on clusters still running 0.9.01.
> We have noticed a node randomly shrinking for the partitions it owns the
> ISR's down to itself, moments later we see other nodes having disconnects,
> followed by finally app issues, where producing to these partitions is
> blocked.
> It seems only by restarting the kafka instance java process resolves the
> issues.
> We have had this occur multiple times and from all network and machine
> monitoring the machine never left the network, or had any other glitches.
> Below are seen logs from the issue.
> Node 7:
> [2016-12-01 07:01:28,112] INFO Partition
> [com_ig_trade_v1_position_event--demo--compacted,10] on broker 7: Shrinking
> ISR for partition [com_ig_trade_v1_position_event--demo--compacted,10] from
> 1,2,7 to 7 (kafka.cluster.Partition)
> All other nodes:
> [2016-12-01 07:01:38,172] WARN [ReplicaFetcherThread-0-7], Error in fetch
> kafka.server.ReplicaFetcherThread$FetchRequest@5aae6d42
> (kafka.server.ReplicaFetcherThread)
> java.io.IOException: Connection to 7 was disconnected before the response was
> read
> All clients:
> java.util.concurrent.ExecutionException:
> org.apache.kafka.common.errors.NetworkException: The server disconnected
> before a response was received.
> After this occurs, we then suddenly see on the sick machine an increasing
> amount of close_waits and file descriptors.
> As a work around to keep service we are currently putting in an automated
> process that tails and regex's for: and where new_partitions hit just itself
> we restart the node.
> "\[(?P<time>.+)\] INFO Partition \[.*\] on broker .* Shrinking ISR for
> partition \[.*\] from (?P<old_partitions>.+) to (?P<new_partitions>.+)
> \(kafka.cluster.Partition\)"
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