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General Troubleshooting

Wiki Markup

...

Ambari Server: Check /var/log/ambari-server/ambari-server.\[log\|out\] for errors.
Ambari Agent: Check /var/log/ambari-agent/ambari-agent.\[log\|out\] for errors.
Note that if Ambari Agent has any output in /var/log/ambari-agent/ambari-agent.out, it is indicative of a significant problem.

...

Services 
...
 fail 
...
 to 
...
 start 
...
 up
...
  • HDFS: 
...
  •  Check 
...
  •  log 
...
  •  files 
...
  •  under 
...
  •  /var/log/hadoop/hdfs
...
  • MapReduce: 
...
  •  Check 
...
  •  log 
...
  •  files 
...
  •  under 
...
  •  /var/log/hadoop/mapred
...
  • HBase: 
...
  •  Check 
...
  •  log 
...
  •  files 
...
  •  under 
...
  •  /var/log/hbase
...
  • Hive: 
...
  •  Check 
...
  •  log 
...
  •  files 
...
  •  under 
...
  •  /var/log/hive
...
  • Oozie: 
...
  •  Check 
...
  •  log 
...
  •  files 
...
  •  under 
...
  •  /var/log/oozie
...
  • ZooKeeper: 
...
  •  Check 
...
  •  log 
...
  •  files 
...
  •  under 
...
  •  /var/log/zookeeper
...
  • WebHCat: 
...
  •  Check 
...
  •  log 
...
  •  files 
...
  •  under 
...
  •  /var/log/webhcat
...
  • Nagios: 
...
  •  Check 
...
  •  log 
...
  •  files 
...
  •  under 
...
  •  /var/log/nagios
...
Nagios 
...
 alerts 
...
 don't 
...
 show 
...
 up 
...
 in 
...
 Ambari 
...
 Web
...
  • Try 
...
  •  running 
...
  •  "service 
...
  •  httpd 
...
  •  restart" 
...
  •  on 
...
  •  the 
...
  •  Nagios 
...
  •  Server 
...
  •  host.
...
Install 
...
 Wizard 
...
 fails 
...
 during 
...
 Install 
...
 phase
...
  • Click 
...
  •  on 
...
  •  the 
...
  •  Retry 
...
  •  button. 
...
  •  In 
...
  •  most 
...
  •  cases, 
...
  •  this 
...
  •  will 
...
  •  solve 
...
  •  install 
...
  •  failures 
...
  •  due 
...
  •  to 
...
  •  package 
...
  •  install 
...
  •  problems 
...
  •  due 
...
  •  to 
...
  •  intermittent 
...
  •  software 
...
  •  repository 
...
  •  availability 
...
  •  (i.e., 
...
  •  "No 
...
  •  more 
...
  •  mirrors 
...
  •  to 
...
  •  retry").
...
Install 
...
 Wizard 
...
 failed 
...
 with 
...
 warning 
...
 during 
...
 Start/Test 
...
 phase
...
  • Proceed 
...
  •  by 
...
  •  hitting 
...
  •  "Next". 
...
  •  Once 
...
  •  you 
...
  •  are 
...
  •  in 
...
  •  the 
...
  •  Dashboard, 
...
  •  go 
...
  •  to 
...
  •  individual 
...
  •  services, 
...
  •  reconfigure, 
...
  •  and 
...
  •  start 
...
  •  them 
...
  •  to 
...
  •  resolve 
...
  •  any 
...
  •  startup 
...
  •  issues.
...
Installing 
...
 a 
...
 new 
...
 cluster 
...
 on 
...
 top 
...
 of 
...
 an 
...
 existing 
...
 cluster
...
When 
...
 installing 
...
 a 
...
 Hadoop 
...
 cluster 
...
 via 
...
 Ambari 
...
 on 
...
 hosts 
...
 that 
...
 already 
...
 have 
...
 Hadoop 
...
 bits 
...
 installed 
...
 (including 
...
 an 
...
 existing 
...
 cluster 
...
 deployed 
...
 via 
...
 Ambari), 
...
 perform 
...
 the 
...
 following:
...
  • Stop 
...
  •  all 
...
  •  the 
...
  •  services 
...
  •  on 
...
  •  all 
...
  •  the 
...
  •  nodes(including 
...
  •  ganglia 
...
  •  and 
...
  •  nagios)
...
  • It 
...
  •  is 
...
  •  also 
...
  •  a 
...
  •  good 
...
  •  practice 
...
  •  to 
...
  •  delete 
...
  •  the 
...
  •  rpms 
...
  •  from 
...
  •  all 
...
  •  nodes.
...
  • search 
...
  •  for 
...
  •  the 
...
  •  rpms:
...

  •  rpm 
...
  •  -qa 
...
  •  | 
...
  •  grep 
...
  •  ganglia
...

  •  rpm 
...
  •  -qa 
...
  •  | 
...
  •  grep 
...
  •  oozie
...

  •  rpm 
...
  •  -qa 
...
  •  | 
...
  •  grep 
...
  •  sqoop
...

  •  rpm 
...
  •  -qa 
...
  •  | 
...
  •  grep 
...
  •  pig
...

  •  rpm 
...
  •  -qa 
...
  •  | 
...
  •  grep 
...
  •  nagios
...

  •  rpm 
...
  •  -qa 
...
  •  | 
...
  •  grep 
...
  •  hadoop
...
  • and 
...
  •  remove 
...
  •  them 
...
  •  :
...

  •  rpm 
...
  •  -e 
...
  •  <package 
...
  •  name>
...
 Anchor
Spaces in manager DN/Base 
...
 DN 
...
 causing 
...
 login 
...
 issues 
...
 in 
...
 Ambari
...
Spaces 
...
 in 
...
 manager 
...
 DN/Base 
...
 DN 
...
 causing 
...
 login 
...
 issues 
...
 in 
...
 Ambari
...
Note 
...
 that 
...
 there 
...
 are 
...
 some 
...
 issues 
...
 with 
...
 Ambari 
...
 current 
...
 release 
...
 1.2.5 
...
 in 
...
 case 
...
 you 
...
 have 
...
 spaces 
...
 in 
...
 baseDN/managerDN. 
...
 Please 
...
 take 
...
 a 
...
 look 
...
 at: 
...
 https://issues.apache.org/jira/browse/ambari-3006Image Added. 
...
 The 
...
 fix 
...
 will 
...
 be 
...
 available 
...
 in 
...
 1.4.1 
...
 release 
...
 of 
...
 Ambari. 
...
 In 
...
 case 
...
 you 
...
 are 
...
 running 
...
 into 
...
 issues 
...
 and 
...
 cant 
...
 get 
...
 rid 
...
 of 
...
 spaces 
...
 in 
...
 the 
...
 managerDN/baseDN 
...
 - 
...
 keep 
...
 reading.
...
I 
...
 have 
...
 created 
...
 a 
...
 jar 
...
 with 
...
 the 
...
 patch 
...
 applied 
...
 on 
...
 top 
...
 of 
...
 branch-1.2.5. 
...
 The 
...
 jar 
...
 is 
...
 posted 
...
 at 
...
 http://people.apache.org/~mahadev/ambari/ambari-server-1.2.5.17.jarImage Added. 
...
Download 
...
 the 
...
 above 
...
 jar 
...
 and 
...
 follow 
...
 the 
...
 following 
...
 steps 
...
 for 
...
 fixing 
...
 the 
...
 issue:
...
  • Stop 
...
  •  ambari 
...
  •  server 
...
  •  using


{
 Code Block
}
ambari-server stop
{code}

* Replace the ambari server jar with the downloaded jar

{code}
  • Replace the ambari server jar with the downloaded jar
 Code Block
cp <download_ambari_server_jar> /usr/lib/ambari-server/ambari-server-1.2.5.17.jar
{code
  • Restart Ambari Server
 Code Block
}

* Restart Ambari Server

{code}
ambari-server start
{code}


This 
...
 should 
...
 fix 
...
 the 
...
 issue 
...
 with 
...
 spaces 
...
 in 
...
 LDAP 
...
 dn 
...
 names.