Troubleshooting ODP

This section helps you with solving and configuring common issues related to component installation in ODP.

Configure /tmp

If /tmp is required to be mounted as exec but compliance issues necessitate mounting it as noexec, follow the steps below on every node to create an alternative tmp directory:

1. Create an alternative tmp directory:

2. Update Ambari configuration for respective services:

• For HBase, YARN-HBase (Timeline Reader), and Ambari Metrics (AMS): In Ambari, update the configurations YARN yarn-hbase-env, AMS ams-hbase-env, and HBase hbase-env by adding:

• For Knox: Directly update gateway.sh and knoxcli.sh in the file system on all Knox hosts by appending:

• For HDFS/YARN/MR: Override HADOOP_OPTS and append:

The above adjustments ensure compatibility and functionality despite the noexec mount constraint.

Impala

1. Update/add these configurations respectively for smooth impala installation

Pre-installation > Update in impala-env, if not set :

is_coordinator = true

is_executor = true

Post-installation > Add custom properties in hadoop core-site :

hadoop.proxyuser.impala.groups=*

hadoop.proxyuser.impala.hosts=*

2. Impala service failed to register ranger authorization :

Ensure ranger is enabled in impala configs. If issue issue still persists, current workaround requires handlers to manage and update hive clients and ranger policies.

• Created dir /etc/ranger/<cluster_name>_hive/policycache and copied respective files from HiveServer2 to impala components

• Copied files /etc/hive/3.2.2.0-2/0/ranger-hive-audit.xml, ranger-hive-security.xml from HS2 to impala components

Ranger

1. If KMS ranger policy fails to create. Perform the following steps:

• Remove the empty KMS policy folder from CLI

• Restart Ranger from Ambari UI

• Then, Restart Ranger KMS from Ambari UI 2. If service repo creation fails with missing rangerlookup user, create rangerlookup user manually from Ranger UI.

Spark2