harcor created SOLR-9170:
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Summary: Need detailed diagnostics for Zookeeper Connection Issues
Key: SOLR-9170
URL: https://issues.apache.org/jira/browse/SOLR-9170
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 6.0.1
Environment: Window or Linux
Reporter: harcor
Priority: Critical
When Solr disconnects from Zookeeper or Zookeeper disconnects from for some
abnormal reason it is difficult to identify the root of the problem. If we
could have a mode that provide additional diagnostics both in the solr log and
zookeeper log.
IE: Solr you could pull system stats about the current state of solr. What
is the load / memory.
IE2: For zookeeper, if might show that the solr socket was abnormally closed
but gives no further info. See the example below.
2016-05-27 00:59:53,357 [myid:1] - INFO
[CommitProcessor:1:ZooKeeperServer@617] - Established session 0x154a2e5fd9b0b2a
with negotiated timeout 120000 for client /17.34.240.66:356202016-05-27
01:00:57,627 [myid:1] - WARN
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of
stream exceptionEndOfStreamException: Unable to read additional data from
client sessionid 0x154a2e5fd9b0b24, likely client has closed socket at
org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) at
org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
at java.lang.Thread.run(Thread.java:745)2016-05-27 01:00:57,627 [myid:1] -
INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - Closed
socket connection for client /17.34.240.66:35266 which had sessionid
0x154a2e5fd9b0b242016-05-27 01:01:00,873 [myid:1] - INFO
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - Closed socket
connection for client /17.34.240.66:35508 which had sessionid
0x154a2e5fd9b0b292016-05-27 01:03:06,425 [myid:1] - INFO
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - Closed socket
connection for client /17.34.240.66:35620 which had sessionid 0x154a2e5fd9b0b2a
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