Help Center > > User Guide> Managing Active Clusters> Alarm Reference> ALM-43010 Heap Memory Usage of the JDBCServer Process Exceeds the Threshold

ALM-43010 Heap Memory Usage of the JDBCServer Process Exceeds the Threshold

Updated at: Mar 31, 2020 GMT+08:00

Description

The system checks the heap memory usage of the JDBCServer process every 30 seconds. The alarm is generated when the heap memory usage of the JDBCServer process exceeds the threshold (90% of the maximum memory).

Attribute

Alarm ID

Alarm Severity

Automatically Cleared

43010

Major

Yes

Parameters

Parameter

Description

ServiceName

Specifies the service for which the alarm is generated.

RoleName

Specifies the role for which the alarm is generated.

HostName

Specifies the host for which the alarm is generated.

Impact on the System

Overhigh heap memory usage of the JDBCServer process deteriorates JDBCServer running performance or even causes OOM, which results in unavailable JDBCServer process.

Possible Causes

The heap memory of the JDBCServer process is overused or inappropriately allocated.

Procedure

  1. Check heap memory usage.

    1. On the MRS cluster details page, click Alarms.

      For MRS 1.8.10 or earlier, log in to MRS Manager and click Alarms.

    2. Select the alarm whose Alarm ID is 43010. Then check the IP address and role name of the instance in Location.
    3. Choose Components > Spark > Instances and click the JDBCServer for which the alarm is generated to enter the Instance Status page. Then choose Customize > Statistics for the heap memory of the JDBCServer Process and click OK.
    4. Check whether the used heap memory of the JDBCServer process reaches 90% of the maximum heap memory specified for JDBCServer.
      • If yes, go to 1.e.
      • If no, go to 2.
    5. Choose Components > Spark > Service Configuration, and set Type to All. Choose JDBCServer > Tuning. Increase the value of SPARK_DRIVER_MEMORY as required.
    6. Check whether the alarm is cleared.
      • If yes, no further action is required.
      • If no, go to 2.

  2. Collect fault information.

    1. On MRS Manager, choose System > Export Log.
    2. Contact the O&M personnel and send the collected log information.

Related Information

N/A

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