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From Loïc Chanel <loic.cha...@telecomnancy.net>
Subject Metrics collector not starting
Date Thu, 29 Jun 2017 09:30:54 GMT
Hi guys,

I have a problem with Ambari Metrics for some days : whenever I try to
start Metrics collector it seems it start and then stop after a minute or
two.
There is nothing in the logs except something pointing to a connection
problem with Zookeper, that causes the Collector to shutdown after a while.

I switched the log to DEBUG mode, here they are :

2017-06-29 11:17:33,144 DEBUG
org.apache.hadoop.hbase.ipc.AbstractRpcClient: Use KERBEROS authentication
for service MasterService, sasl=true
2017-06-29 11:17:33,156 DEBUG
org.apache.hadoop.hbase.ipc.AbstractRpcClient: Connecting to
server03.net:61300
2017-06-29 11:17:33,159 DEBUG
org.apache.hadoop.security.UserGroupInformation: PrivilegedAction
as:amshbase/server03@EXAMPLE.COM (auth:KERBEROS)
from:org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.setupIOstreams(RpcClientImpl.java:734)
2017-06-29 11:17:33,161 DEBUG
org.apache.hadoop.hbase.security.HBaseSaslRpcClient: Creating SASL GSSAPI
client. Server's Kerberos principal name is amshbase/server03@EXAMPLE.COM
2017-06-29 11:17:33,167 DEBUG
org.apache.hadoop.hbase.security.HBaseSaslRpcClient: Have sent token of
size 685 from initSASLContext.
2017-06-29 11:17:33,183 DEBUG
org.apache.hadoop.hbase.security.HBaseSaslRpcClient: Will read input token
of size 108 for processing by initSASLContext
2017-06-29 11:17:33,186 DEBUG
org.apache.hadoop.hbase.security.HBaseSaslRpcClient: Will send token of
size 0 from initSASLContext.
2017-06-29 11:17:33,186 DEBUG
org.apache.hadoop.hbase.security.HBaseSaslRpcClient: Will read input token
of size 32 for processing by initSASLContext
2017-06-29 11:17:33,187 DEBUG
org.apache.hadoop.hbase.security.HBaseSaslRpcClient: Will send token of
size 32 from initSASLContext.
2017-06-29 11:17:33,187 DEBUG
org.apache.hadoop.hbase.security.HBaseSaslRpcClient: SASL client context
established. Negotiated QoP: auth
2017-06-29 11:17:33,535 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 6,3  replyHeader:: 6,73014444188,0  request::
'/ams-hbase-unsecure,F  response::
s{68719476743,68719476743,1498721274392,1498721274392,0,36,0,0,0,10,73014444180}
2017-06-29 11:17:33,536 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 7,4  replyHeader:: 7,73014444188,0  request::
'/ams-hbase-unsecure/master,F  response::
#ffffffff000146d61737465723a363133303052ffffffb4ffffffc97fffffffdfffffff99ffffffc9ffffffec50425546a29a1c6e7077626930303033732e646174612e6d657368636f72652e6e657410fffffff4ffffffde318ffffffccffffffbbffffff90ffffff99ffffffcf2b10018fffffffeffffffde3,s{73014444180,73014444180,1498727850646,1498727850646,0,0,0,170278009368018956,78,0,73014444180}
2017-06-29 11:17:33,840 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 8,3  replyHeader:: 8,73014444188,0  request::
'/ams-hbase-unsecure,F  response::
s{68719476743,68719476743,1498721274392,1498721274392,0,36,0,0,0,10,73014444180}
2017-06-29 11:17:33,842 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 9,4  replyHeader:: 9,73014444188,0  request::
'/ams-hbase-unsecure/master,F  response::
#ffffffff000146d61737465723a363133303052ffffffb4ffffffc97fffffffdfffffff99ffffffc9ffffffec50425546a29a1c6e7077626930303033732e646174612e6d657368636f72652e6e657410fffffff4ffffffde318ffffffccffffffbbffffff90ffffff99ffffffcf2b10018fffffffeffffffde3,s{73014444180,73014444180,1498727850646,1498727850646,0,0,0,170278009368018956,78,0,73014444180}
2017-06-29 11:17:34,349 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 10,3  replyHeader:: 10,73014444192,0  request::
'/ams-hbase-unsecure,F  response::
s{68719476743,68719476743,1498721274392,1498721274392,0,37,0,0,0,9,73014444190}
2017-06-29 11:17:34,350 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 11,4  replyHeader:: 11,73014444192,-101  request::
'/ams-hbase-unsecure/master,F  response::
2017-06-29 11:17:34,355 DEBUG org.apache.hadoop.hbase.zookeeper.ZKUtil:
hconnection-0x6d0b5baf-0x15cf2f282460011,
quorum=server01:2181,server02:2181,server03:2181,
baseZNode=/ams-hbase-unsecure Unable to get data of znode
/ams-hbase-unsecure/master because node does not exist (not an error)
2017-06-29 11:17:35,360 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 12,3  replyHeader:: 12,73014444192,0  request::
'/ams-hbase-unsecure,F  response::
s{68719476743,68719476743,1498721274392,1498721274392,0,37,0,0,0,9,73014444190}
2017-06-29 11:17:35,361 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 13,4  replyHeader:: 13,73014444192,-101  request::
'/ams-hbase-unsecure/master,F  response::
2017-06-29 11:17:35,361 DEBUG org.apache.hadoop.hbase.zookeeper.ZKUtil:
hconnection-0x6d0b5baf-0x15cf2f282460011,
quorum=server01:2181,server02:2181,server03:2181,
baseZNode=/ams-hbase-unsecure Unable to get data of znode
/ams-hbase-unsecure/master because node does not exist (not an error)
2017-06-29 11:17:37,369 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 14,3  replyHeader:: 14,73014444192,0  request::
'/ams-hbase-unsecure,F  response::
s{68719476743,68719476743,1498721274392,1498721274392,0,37,0,0,0,9,73014444190}
2017-06-29 11:17:37,370 DEBUG org.apache.zookeeper.ClientCnxn: Reading
reply sessionid:0x15cf2f282460011, packet:: clientPath:null serverPath:null
finished:false header:: 15,4  replyHeader:: 15,73014444192,-101  request::
'/ams-hbase-unsecure/master,F  response::

I tried to dig into ZooKeeper, and it seems indeed that znode
/ams-hbase-unsecure/master does not exist, but as it's not an error I don't
know what is.
I checked Metrics collector and AMS HBase configuration : everything seems
correct, and the AMS HBase ZooKeeper part looks like HBase Zookeeper native
configuration.

I saw a "solution" consisting in deleting Ambari Metrics Service then
installing it again, but I'm in a production cluster and that seems very
painfull and risky for a bug like this, so I'd like to avoid that kind of
"solution".

Did someone encouter that issue ? Is it solved ?
Does anyone has an idea about where that might come from ?

Thanks for your help,


Loïc

Loïc CHANEL
System Big Data engineer
MS&T - Worldline Analytics Platform - Worldline (Villeurbanne, France)

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