VERIFY_HADOOP_CONF_DIR

Verifies that the Hadoop configuration that is used to access HDFS is valid on all Vertica nodes. The configuration is valid if:

• all required configuration files are found on the path defined by the HadoopConfDir configuration parameter

• all properties needed by Vertica are set in those files

This function does not attempt to validate the settings of those properties; it only verifies that they have values.

It is possible for Hadoop configuration to be valid on some nodes and invalid on others. The function reports a validation failure if the value is invalid on any node; the rest of the output reports the details.

This is a meta-function. You must call meta-functions in a top-level SELECT statement.

Behavior type

Syntax

VERIFY_HADOOP_CONF_DIR( )

Parameters

This function has no parameters.

Privileges

This function does not require privileges.

Examples

The following example shows the results when the Hadoop configuration is valid.

=> SELECT VERIFY_HADOOP_CONF_DIR();
    verify_hadoop_conf_dir
-------------------------------------------------------------------
Validation Success
v_vmart_node0001: HadoopConfDir [PG_TESTOUT/config] is valid
v_vmart_node0002: HadoopConfDir [PG_TESTOUT/config] is valid
v_vmart_node0003: HadoopConfDir [PG_TESTOUT/config] is valid
v_vmart_node0004: HadoopConfDir [PG_TESTOUT/config] is valid
    (1 row)

In the following example, the Hadoop configuration is valid on one node, but on other nodes a needed value is missing.

=> SELECT VERIFY_HADOOP_CONF_DIR();
    verify_hadoop_conf_dir
-------------------------------------------------------------------
Validation Failure
v_vmart_node0001: HadoopConfDir [PG_TESTOUT/test_configs/config] is valid
v_vmart_node0002: No fs.defaultFS parameter found in config files in [PG_TESTOUT/config]
v_vmart_node0003: No fs.defaultFS parameter found in config files in [PG_TESTOUT/config]
v_vmart_node0004: No fs.defaultFS parameter found in config files in [PG_TESTOUT/config]
    (1 row)