Ranger Usersync Not Starting

[#1]

Hi Team,

Ranger usersync daemon is not starting in our cluster.We are using HDP-2.5.6.

We are getting following error in ranger usersync log file:

19 May 2018 00:01:25 ERROR UserGroupSync [UnixUserSyncThread] - Failed to initialize UserGroup source/sink. Will retry after 60000 milliseconds. Error details:
java.lang.NoClassDefFoundError: org/apache/commons/httpclient/URIException
        at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.delXUserGroupInfo(PolicyMgrUserGroupBuilder.java:615)
        at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.delXUserGroupInfo(PolicyMgrUserGroupBuilder.java:600)
        at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.addOrUpdateUser(PolicyMgrUserGroupBuilder.java:326)
        at org.apache.ranger.unixusersync.process.UnixUserGroupBuilder.updateSink(UnixUserGroupBuilder.java:92)
        at org.apache.ranger.usergroupsync.UserGroupSync.run(UserGroupSync.java:58)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.httpclient.URIException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

After debugging we found that its an known issue in Ranger:
https://issues.apache.org/jira/browse/RANGER-989

As per mentioned in "RANGER-989" we have copied given jar files from ranger-admin lib to usersync lib and restarted Ranger service:

cp /usr/hdp/current/ranger-admin/ews/webapp/WEB-INF/lib/commons-httpclient-3.1.jar /usr/hdp/current/ranger-usersync/lib/

cp /usr/hdp/current/ranger-admin/ews/webapp/WEB-INF/lib/commons-codec-1.9.jar /usr/hdp/current/ranger-usersync/lib/

Still we are getting same error.

How to resolve it? Please suggest.

Thanks,

Bhushan

[#2]

@Bhushan Kandalkar Try Copying the jars to /usr/hdp/current/ranger-usersync/lib/

[#3]

@Sandeep Nemuri, I have already copied these jars to /usr/hdp/current/ranger-usersync/lib/. But still getting same error.

[#4]

@Bhushan Kandalkar

RANGER-989 is actually a duplicate of

https://issues.apache.org/jira/browse/RANGER-804

Solution to this issue was to include the following 2 jars in the lib directory for the usersync process

commons-httpclient-3.1.jar
commons-codec-1.4.jar

Make sure you are on the correct node when copying the files to /usr/hdp/current/ranger-usersync/lib/ as usersync process maybe installed on separate node.

HTH

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[#5]

@Felix Albani, I have copied jars at /usr/hdp/current/ranger-usersync/lib/. Also, I did these changes on Ranger machine. But still getting same error.

[#6 · Accepted solution]

Hi @Bhushan Kandalkar can you please run below command on host

$ hdp-select it will show you all the services stack versions please check ranger-usersync service version then verify it with

ps -ef | grep ranger-usersync it will show you ranger user sync service process and from where its taking libraries.

Eg.

$hdp-select

ranger-usersync - 2.5.6.0-40

$ps -ef | grep ranger-usersync

ps -ef | grep rangeruser ranger 15429 1 99 08:53 ? 00:00:11 java -Dproc_rangerusersync -Dlog4j.configuration=file:/etc/ranger/usersync/conf/log4j.properties -Dlogdir=/var/log/ranger/usersync -cp /usr/hdp/2.5.6.0-40/ranger-usersync/dist/*:/usr/hdp/2.5.6.0-40/ranger-usersync/lib/*:/usr/hdp/2.5.6.0-40/ranger-usersync/conf:/* org.apache.ranger.authentication.UnixAuthenticationService -enableUnixAuth root 15579 13151 0 08:53 pts/2 00:00:00 grep --color=auto rangeruser

if it doesnt match then you need to kill process with

kill -9 15429

and restart your service.

it should resolve this issue. I faced this issue in our production envirnment after upgrading HDP from 2.3.4.0 to 2.5.6.0 and I resolved it by above mentionned way. Please update me if this resolution helped you too.

[#7]

Thanks @Arshadullah Khan. That worked.