Gabor Arki created KYLIN-4500:
---------------------------------
Summary: Timeout waiting for connection from pool
Key: KYLIN-4500
URL: https://issues.apache.org/jira/browse/KYLIN-4500
Project: Kylin
Issue Type: Bug
Reporter: Gabor Arki
h4. Environment
* Kylin server 3.0.0
* EMR 5.28
h4. Issue
After an extended uptime, both Kylin query server and jobs running on EMR stop
working. The root cause is both cases is:
{{Caused by: java.io.IOException:
com.amazon.ws.emr.hadoop.fs.shaded.com.amazonaws.SdkClientException: Unable to
execute HTTP request: Timeout waiting for connection from pool}}
{{ at
com.amazon.ws.emr.hadoop.fs.s3n2.S3NativeFileSystem2.getFileStatus(S3NativeFileSystem2.java:257)
~[emrfs-hadoop-assembly-2.37.0.jar:?]}}
{{Based on
[https://aws.amazon.com/premiumsupport/knowledge-center/emr-timeout-connection-wait/]
increasing the *fs.s3.maxConnections* setting to 10000 is just delaying the
issue thus the underlying issue is likely a connection leak. It also indicates
a leak that restarting the kylin service solves the problem.}}
{{A full stack trace from the QueryService is attached.}}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
