Help Center > > User Guide> MRS Manager Operation Guide (Applicable to 2.x and Earlier Versions)> Alarm Reference (Applicable to Versions Earlier Than MRS 3.x)> ALM-16000 Percentage of Sessions Connected to the HiveServer to the Maximum Number Allowed Exceeds the Threshold

ALM-16000 Percentage of Sessions Connected to the HiveServer to the Maximum Number Allowed Exceeds the Threshold

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

Description

The system checks the percentage of sessions connected to the HiveServer to the maximum number allowed every 30 seconds. This indicator can be viewed on the Hive service monitoring page. This alarm is generated when the the percentage of sessions connected to the HiveServer to the maximum number allowed exceeds the specified threshold (90% by default).

This alarm can be automatically cleared when the percentage is less than or equal to the threshold.

Attribute

Alarm ID

Alarm Severity

Auto Clear

16000

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.

Trigger condition

Generates an alarm when the actual indicator value exceeds the specified threshold.

Impact on the System

If a connection alarm is generated, too many sessions are connected to the HiveServer and new connections cannot be created.

Possible Causes

Too many clients are connected to the HiveServer.

Procedure

  1. Increase the maximum number of connections to Hive.

    1. Go to the MRS cluster details page and click Components.
    2. Choose Hive > Service Configuration and switch Basic to All.
    3. Increase the value of the hive.server.session.control.maxconnections configuration item. Suppose the value of the configuration item is A, the threshold is B, and sessions connected to the HiveServer is C. Adjust the value of the configuration item according to A x B > C. Sessions connected to the HiveServer can be viewed on the Hive monitoring page.
    4. 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 logs.

Reference

None

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