:original_name: mrs_01_1576.html

.. _mrs_01_1576:

Environment
===========

Scenario
--------

In scenarios raising special requirements on JVM configuration, users can use configuration items to transfer JVM parameters to the client, JobManager, and TaskManager.

Configuration
-------------

Configuration items include JVM parameters.

.. table:: **Table 1** Parameter description

   +---------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+
   | Parameter     | Description                                                                                                                                             | Default Value                                                                                                                                                                                                                                                                                                                                                                                                                                   | Mandatory |
   +===============+=========================================================================================================================================================+=================================================================================================================================================================================================================================================================================================================================================================================================================================================+===========+
   | env.java.opts | JVM parameter, which is transferred to the startup script, JobManager, TaskManager, and Yarn client. For example, transfer remote debugging parameters. | -Xloggc:<LOG_DIR>/gc.log -XX:+PrintGCDetails -XX:-OmitStackTraceInFastThrow -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=20 -XX:GCLogFileSize=20M -Djdk.tls.ephemeralDHKeySize=2048 -Djava.library.path=${HADOOP_COMMON_HOME}/lib/native -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false -Dbeetle.application.home.path=\ *$BIGDATA_HOME*/common/runtime/security/config | No        |
   +---------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+