ALM-17011 Abnormal Connection Between Oozie and Yarn

Alarm Description

Oozie depends on Yarn. After a task is submitted, the system checks Yarn connectivity. This alarm is generated when the service fails the check for 5 consecutive times.

This alarm is cleared when the connection between Oozie and Yarn becomes normal.

Alarm Attributes

Alarm ID	Alarm Severity	Alarm Type	Service Type	Auto Cleared
17011	Minor	Error handling	Oozie	Yes

Alarm Parameters

Type	Parameter	Description
Location Information	Source	Specifies the cluster for which the alarm is generated.
	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.
Additional Information	Trigger Condition	Specifies the alarm triggering condition.

Impact on the System

Running scheduling tasks are blocked and new scheduling tasks cannot be submitted.

Possible Causes

The Yarn service is abnormal.
The connection between Oozie and Yarn is abnormal.

Handling Procedure

Check the YARN service status.

In the service list on FusionInsight Manager, check whether Running Status of Yarn is Normal.
- If yes, go to 5.
- If no, go to 2.
In the alarm list, check whether ALM-18000 YARN Service Unavailable is generated.
- If yes, go to 3.
- If no, go to 5.
Rectify the fault by performing the operations provided for ALM-18000 Yarn Service Unavailable.
Wait for several minutes and check whether the alarm Abnormal Connection Between Oozie and Yarn is cleared.
- If yes, no further action is required.
- If no, go to 5.

Check the connectivity between Oozie and Yarn.

Log in to FusionInsight Manager, choose O&M > Log > Online Search, select the Oozie service, and search for the keyword [Oozie Alarm Enhancement][Yarn] in the log. View the cause in the log, and rectify the fault. In the alarm list, check whether the alarm Abnormal Connection Between Oozie and Yarn is cleared.
- If yes, no further action is required.
- If no, go to 6.

Collect fault information.

On FusionInsight Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
Select Oozie for Service and click OK.
Click the edit icon in the upper right corner, and set Start Date and End Date for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click Download.
Contact O&M engineers and provide the collected logs.