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.

This section applies only to MRS 3.3.0-LTS or later.

Alarm Attributes

Alarm Parameters

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.

1. In the service list on FusionInsight Manager, check whether Running Status of YARN is Normal.
   • If yes, go to Step 5.
   • If no, go to Step 2.

2. Check whether there is an ALM-18000 Yarn Service Unavailable alarm in the alarm list.
   • If yes, go to Step 3.
   • If no, go to Step 5.

3. Rectify the fault by performing the operations provided for ALM-18000 YARN Service Unavailable.
4. 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 Step 5.

Check the connectivity between Oozie and YARN.

5. 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 Step 6.

Collect fault information.

6. On FusionInsight Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
7. Select Oozie for Service and click OK.
8. Click in the upper right corner, set Start Date and End Date for log collection to 10 minutes before and after the alarm generation time, respectively, and click Download.
9. Send the collected fault logs to O&M personnel for help.

Alarm Clearance

This alarm is automatically cleared after the fault is rectified.

Related Information

None.