Help Center > > User Guide> Managing an Existing Cluster> MRS Patch Description> MRS Patch Description

MRS Patch Description

Updated at: Aug 17, 2021 GMT+08:00

Basic Information

Table 1 Basic information

Patch Version


Release Date


Resolved Issues

List of resolved issues in MRS

MRS Manager

Problems of Manager executor's high concurrent job submission have been solved.

MRS big data components

Data insertion failure in hive on tez has been fixed.

List of the resolved issues in MRS

MRS Manager

No monitoring information is displayed after NodeAgent is restarted.

When a job is under submission for a long time, memory overflow occurs in the manager executor process.

Job submission is supported. manager executor can be used to configure high concurrency.

New Kafka topics are not displayed on the MRS Manager management plane.

When you call security cluster's APIs to submit the Spark Submit job and perform operations on an HBase table, the permission control on the HBase table does not take effect.

The MRS Manager patch mechanism has been optimized.

MRS big data components

The slow running of the load data inpath command executed by Spark has been optimized.

Column names containing the dollar sign ($) can be used in Spark table creation.

OBS-related problems have been solved.

List of the resolved issues in MRS

MRS Manager

The return results of Hive SQL statements submitted by V2 jobs have been optimized, and the issue that V2 jobs fail to be submitted using an agency token has been solved.

MRS big data components

HiveServer out of memory (OOM) has been solved for MRS Hive: HIVE-10970 and HIVE-22275.

Compatibility with Other Patches

The MRS patch package contains all patches released for MRS 2.1.0.

Impact of Patch Installation

  • During the installation of the MRS patch, MRS Manager will be restarted, and the components such as Hive, Spark, HDFS, Yarn, MapReduce, Presto, HBase, and related dependent services will be restarted in rolling mode. During the restart of MRS Manager, services are temporarily unavailable but services are not interrupted during the rolling restart.
  • After installing the MRS patch, you need to download and install all clients again, including the original clients of Master nodes and the clients used by other nodes of VPC (that is, the clients that you set up).
    • You are advised to back up the old clients before reinstalling the new ones.
    • If you have modified client configurations based on the service scenario, modify them again after reinstalling the clients.

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