question Required permissions for my custom JDK ? in Archives of Support Questions (Read Only)

Required permissions for my custom JDK ?

adityakumar_roy — Thu, 30 Mar 2017 00:00:35 GMT

Hi,

I have successfully added custom JDK on my hortonworks. My JAVA_HOME refers to : /root/java/jdk1.8.0_121/bin/java

This is the net stat of the java file :

-rwxrwxrwx 1 root root 7734 2017-03-24 06:22 java

--- However all my services on ambari, are now refering to this JAVA_HOME path, and returning same error : Permission denied. One of the services ran from hdfs user.

So I want to ask, what is the required set of permissions, I need to pass the requisite permissions to this file to complete it finally. Please help asap.

Re: Required permissions for my custom JDK ?

namaheshwari — Thu, 30 Mar 2017 01:38:22 GMT

@Aditya Kumar Roy

JAVA_HOME env variable should be set till the jdk home path i.e it should be /root/java/jdk1.8.0_121, for your case.

Can you try setting the same, and let us know if that resolves the issue.

Re: Required permissions for my custom JDK ?

adityakumar_roy — Thu, 30 Mar 2017 13:15:00 GMT

Hi, that was a mistake on my side. Obviously, my JAVA_HOME path points till /root/java/jdk1.8.0_121. However the pertinent issue is which user ambari is trying to run with. Please revert back on that.

Re: Required permissions for my custom JDK ?

namaheshwari — Thu, 30 Mar 2017 13:31:38 GMT

Have you updated the JAVA_HOME path in hadoop-env.sh file.

Also, which component were you trying to restart and what was the order of restart if there were more than one components.

Re: Required permissions for my custom JDK ?

adityakumar_roy — Thu, 30 Mar 2017 13:51:44 GMT

Please find the logs when starting the Namenode from Ambari. As can be observed, it's trying to log in from hdfs user. I have already allotted it the necessary permissions :

-rwxrwxrwx 1 hdfs hadoop 7734 2017-03-24 06:22 java

However it still gets struck.

resource_management.core.exceptions.Fail: Execution of 'ambari-sudo.sh su hdfs -l -s /bin/bash -c 'ulimit -c unlimited ; /usr/hdp/current/hadoop-client/sbin/hadoop-daemon.sh --config /usr/hdp/current/hadoop-client/conf start namenode'' returned 1. starting namenode, logging to /var/log/hadoop/hdfs/hadoop-hdfs-namenode-sandbox.hortonworks.com.out

/usr/hdp/2.4.0.0-169//hadoop-hdfs/bin/hdfs.distro: line 308: /root/java/jdk1.8.0_121/bin/java: Permission denied
/usr/hdp/2.4.0.0-169//hadoop-hdfs/bin/hdfs.distro: line 308: exec: /root/java/jdk1.8.0_121/bin/java: cannot execute: Permission denied

Re: Required permissions for my custom JDK ?

jsensharma — Thu, 30 Mar 2017 14:11:58 GMT

@Aditya Kumar Roy

Looks like you have not given the permission recursively. Have you used "-R" option with "chmod" ?

Example:

# chmod 755 -R /root/java/

Just for quick verification you can list the file to see the current permission:

# ls -l /root/java/jdk1.8.0_121/bin/java

Re: Required permissions for my custom JDK ?

adityakumar_roy — Thu, 30 Mar 2017 20:13:09 GMT

Okay, so I am sharing what worked out for me :

Starting with @Jay SenSharma, I did give the 777 recursive permissions several times in the past, without in the past. However what has finally worked for me is :

I kept my custom JDK in /usr/lib, I then made a simulink of the full path of custom jdk kept in lib to /usr/lib/jvm.

And then, it worked. I guess not keeping the jdk in the lib was a major fracture point. Thanks a lot for the support man.