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https://issues.apache.org/jira/browse/KAFKA-5007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16047561#comment-16047561
]
huxihx commented on KAFKA-5007:
-------------------------------
[~junrao] is it possible that it 's caused by the code snippet below:
{code:java}
...
SocketChannel socketChannel = SocketChannel.open();
socketChannel.configureBlocking(false);
Socket socket = socketChannel.socket();
socket.setKeepAlive(true);
if (sendBufferSize != Selectable.USE_DEFAULT_BUFFER_SIZE)
socket.setSendBufferSize(sendBufferSize);
if (receiveBufferSize != Selectable.USE_DEFAULT_BUFFER_SIZE)
socket.setReceiveBufferSize(receiveBufferSize);
socket.setTcpNoDelay(true);
boolean connected;
try {
connected = socketChannel.connect(address);
} catch (UnresolvedAddressException e) {
socketChannel.close();
throw new IOException("Can't resolve address: " + address, e);
} catch (IOException e) {
socketChannel.close();
throw e;
}
{code}
The code did not capture all possible exceptions so `socketChannel` got failed
to be closed.
> Kafka Replica Fetcher Thread- Resource Leak
> -------------------------------------------
>
> Key: KAFKA-5007
> URL: https://issues.apache.org/jira/browse/KAFKA-5007
> Project: Kafka
> Issue Type: Bug
> Components: core, network
> Affects Versions: 0.10.0.0, 0.10.1.1, 0.10.2.0
> Environment: Centos 7
> Jave 8
> Reporter: Joseph Aliase
> Priority: Critical
> Labels: reliability
> Attachments: jstack-kafka.out, jstack-zoo.out, lsofkafka.txt,
> lsofzookeeper.txt
>
>
> Kafka is running out of open file descriptor when system network interface is
> done.
> Issue description:
> We have a Kafka Cluster of 5 node running on version 0.10.1.1. The open file
> descriptor for the account running Kafka is set to 100000.
> During an upgrade, network interface went down. Outage continued for 12 hours
> eventually all the broker crashed with java.io.IOException: Too many open
> files error.
> We repeated the test in a lower environment and observed that Open Socket
> count keeps on increasing while the NIC is down.
> We have around 13 topics with max partition size of 120 and number of replica
> fetcher thread is set to 8.
> Using an internal monitoring tool we observed that Open Socket descriptor
> for the broker pid continued to increase although NIC was down leading to
> Open File descriptor error.
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