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https://issues.apache.org/jira/browse/KAFKA-4477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15743283#comment-15743283
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Apurva Mehta commented on KAFKA-4477:
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Hi [~tdevoe]: Thanks for sharing those logs. I had a look, but they only
include data right when the issue happened. Is it possible to provide the logs
for few hours prior? OR is there nothing noteworthy there, which is why you
didn't include that time period?
Thanks,
Apurva
> 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: issue_node_1001.log, issue_node_1002.log,
> issue_node_1003.log, 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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