Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-19012 HBase System Table Directory or File Lost
Updated on 2024-09-23 GMT+08:00
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ALM-19012 HBase System Table Directory or File Lost

Description

The system checks whether HBase directories and files exist on the HDFS every 120 seconds. This alarm is generated when the system detects that the files or directories do not exist. This alarm is cleared when the files or directories are restored.

The HBase directories and files are as follows:

  • Directory of the namespace hbase on the HDFS
  • hbase.version file
  • Directory of the table hbase:meta on the HDFS, .tableinfo file, and .regioninfo file
  • Directory of the table hbase:namespace on the HDFS, .tableinfo file, and .regioninfo file
  • Directory of the table hbase:hindex on the HDFS, .tableinfo file, and .regioninfo file
  • Directory of the hbase:acl table on the HDFS, .tableinfo, and .regioninfo file (This table does not exist in the common mode cluster by default.)

Attribute

Alarm ID

Alarm Severity

Automatically Cleared

19012

Critical

Yes

Parameters

Name

Meaning

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.

Impact on the System

The HBase service fails to be restarted or started. As a result, all HBase service requests fail.

Possible Causes

Files or directories on the HDFS are missing.

Procedure

Locate the alarm cause.

  1. On the FusionInsight Manager, choose O&M > Alarm > Alarms. Click this alarm and check whether Alarm Cause indicates unknown errors.

    • If yes, go to 4.
    • If no, go to 2

  2. On the FusionInsight Manager home page, choose O&M > Backup and Restoration > Backup Management. Check whether there are success records of the backup task named default or other HBase metadata backup tasks that have been successfully executed.

    • If yes, go to 3.
    • If no, go to 4.

  3. Use the latest backup metadata to restore the metadata of the HBase service.

Collect fault information.

  1. On the FusionInsight Manager page of the active and standby clusters, choose O&M > Log > Download.
  2. In the Service area, select faulty HBase services in the required cluster.
  3. Click 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.
  4. Contact the O&M personnel and send the collected logs.

Alarm Clearing

After the fault is rectified, the system automatically clears this alarm.

Related Information

None