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Help Center/ MapReduce Service/ FAQs/ Peripheral Ecosystem Interconnection/ How Do I Solve the Jetty Version Compatibility Issue in Open-Source Kylin 3.x and MRS 1.9.3 Interconnection?

How Do I Solve the Jetty Version Compatibility Issue in Open-Source Kylin 3.x and MRS 1.9.3 Interconnection?

Updated on 2022-09-14 GMT+08:00

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For security purposes, MRS has upgraded some open-source third-party components that have serious security vulnerabilities. The upgrade causes the Jetty version compatibility issue when the open-source Kylin interconnects with MRS 1.9.3.

Perform the following operations to solve the issue:

Install the MRS client on an ECS node. . This operation uses the MRS client installation path /srv/client/ as an example.
After the installation is complete, run the following commands to import the MRS client environment variable bigdata_env and the environment variables HIVE_CONF and HCAT_HOME required by Kylin.
source /srv/client/bigdata_env

export HIVE_CONF=/srv/client/Hive/config/

export HCAT_HOME=/srv/client/Hive/HCatalog
Install Kylin on the node where the MRS client is installed and specify KYLIN_HOME. For details, see the Kylin official website. For MRS 1.9.3, select Kylin for HBase 1.x for interconnection.
export KYLIN_HOME=/srv/client/apache-kylin-3.0.2-bin-hbase1x

Remove Jetty .jar packages from the /srv/client/Hive/Beeline/lib/ directory in the Hive client directory to prevent version conflicts.

Jetty .jar packages:

javax-websocket-server-impl-9.4.26.v20200117.jar
websocket-server-9.4.26.v20200117.jar
jetty-all-9.4.26.v20200117-uber.jar
jetty-runner-9.4.26.v20200117.jar
apache-jsp-9.4.26.v20200117.jar

Start the Kylin service and check Kylin logs. In normal cases, the logs do not contain compatibility errors, such as java.lang.NoSuchMethodException and java.lang.ClassNotFoundException.
$KYLIN_HOME/bin/kylin.sh start
Access the native Kylin page at http://<hostname>:7070/kylin and run the sample Cube script ${KYLIN_HOME}/bin/sample.sh to check whether Kylin is running properly.

Parent topic: Peripheral Ecosystem Interconnection

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