Help Center/ MapReduce Service/ User Guide (Ankara Region)/ Alarm Reference/ ALM-45430 Permission Metadata Synchronization Failed on the Added ClickHouse Node

Updated on 2024-11-29 GMT+08:00

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ALM-45430 Permission Metadata Synchronization Failed on the Added ClickHouse Node

This section applies only to MRS 3.1.2 or later.

Alarm Description

This alarm is generated when user and permission information fails to be synchronized during ClickHouse capacity expansion.

Alarm Attributes

Alarm ID	Alarm Severity	Alarm Type	Service Type	Auto Cleared
45430	Major	Quality of service	ClickHouse	No

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 created user does not have operation permissions on the node.

Possible Causes

A node is stopped or faulty during capacity expansion.

Handling Procedure

On FusionInsight Manager, choose Cluster > Services > ClickHouse > Instance.
Check whether an instance is stopped, decommissioned, or faulty.
- If yes, go to 3.
- If no, go to 4.
Start the instance or rectify the instance fault until all instances are running properly.
On FusionInsight Manager, choose O&M > Alarm > Alarms, locate this alarm and the faulty host based on the location information.

Log in to the faulty host as user omm.
Run the following commands to initialize environment variables:

source ${BIGDATA_HOME}/FusionInsight_ClickHouse_*/*_*_ClickHouseServer/etc/ENV_VARS

source ${BIGDATA_HOME}/FusionInsight_ClickHouse_*/*_*_ClickHouseServer/etc/clickhouse-env.sh

export CLICKHOUSE_CONF_DIR=${CLICKHOUSE_CONF_DIR}
Run the following command to run the metadata synchronization tool to synchronize metadata from the existing node to the faulty node:

sh ${BIGDATA_HOME}/FusionInsight_ClickHouse_*/install/FusionInsight-ClickHouse-*/clickhouse/sbin/clickhouse-create-meta.sh true
Run the following command to view the log information and check whether the metadata has been synchronized:

vim /var/log/Bigdata/clickhouse/clickhouseServer/start.log

If the synchronization is complete, go to 9.

If the synchronization fails, go to 10.
On FusionInsight Manager, choose O&M > Alarm > Alarms. In the Alarm ID column, locate the corresponding alarm and click Clear in the Operation column. In the displayed dialog box, click OK to manually clear the alarm.

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, select ClickHouse for the target cluster, and click OK.
Expand the Hosts drop-down list and select the target hosts.
Click the edit icon in the upper right corner, and set Start Date and End Date for log collection to 30 minutes ahead of and after the alarm generation time, respectively. Then, click Download.
Contact O&M engineers and provide the collected logs.