ALM-45444 Abnormal ClickHouse Process
Alarm Description
The health check module checks ClickHouse instances every 30 seconds. If the number of consecutive failures exceeds the threshold, an alarm is reported. In this case, the ClickHouse process may stop responding and services cannot be properly executed.
Alarm Attributes
Alarm ID |
Alarm Severity |
Auto Cleared |
---|---|---|
45444 |
Critical |
Yes |
Alarm Parameters
Parameter |
Description |
---|---|
Source |
Specifies the cluster or system 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
If the ClickHouse process is abnormal, services cannot run properly.
Possible Causes
The ClickHouse process runs improperly.
Handling Procedure
- Log in to FusionInsight Manager, choose O&M > Alarm > Alarms, and view the role name and the IP address for the hostname in Location.
- Log in to the node where the client is installed as the client installation user and run the following commands:
cd {Client installation path}
source bigdata_env
- For a cluster with Kerberos authentication enabled (security mode):
clickhouse client --host IP address of the ClickHouseServer instance that reports the alarm --port 9440 --secure
- For a cluster with Kerberos authentication disabled (normal mode):
clickhouse client --host IP address of the ClickHouseServer instance that reports the alarm --user Username --password --port 9000
- For a cluster with Kerberos authentication enabled (security mode):
- Run the following statement to check whether the result can be properly returned:
SELECT 1;
- Wait for several minutes and check whether the alarm is cleared.
- If yes, no further action is required.
- If no, go to 5.
Collect fault information.
- On FusionInsight Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
- Expand the Service drop-down list, and select ClickHouse for the target cluster.
- Expand the Hosts drop-down list. In the Select Host dialog box that is displayed, select the abnormal host, and click OK.
- Click the edit icon in the upper right corner, and set Start Date and End Date for log collection to 1 hour ahead of and after the alarm generation time, respectively. Then, click Download.
- Contact O&M personnel and provide the collected logs.
Alarm Clearance
This alarm is automatically cleared after the fault is rectified.
Related Information
None.
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