ALM-19012 HBase System Table Directory or File Lost

Alarm 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.)

Alarm Attributes

Alarm ID	Alarm Severity	Alarm Type	Service Type	Auto Cleared
19012	Critical	Error handling	HBase	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.

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.

Handling Procedure

Locate the alarm cause.

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

Collect fault information.

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