ALM-45595 IoTDBServer Cross-Space Merge Duration Exceeds the Threshold

Alarm Description

This alarm is generated when the cross-space merge duration exceeds the threshold. This alarm is cleared when the cross-space merge duration is less than the threshold.

Alarm Attributes

Alarm ID	Alarm Severity	Alarm Type	Service Type	Auto Cleared
45595	Major	Quality of service	IoTDB	Yes

Alarm Parameters

Type	Parameter	Description
Location Information	Source	Specifies the cluster for which the alarm was generated.
	ServiceName	Specifies the service for which the alarm was generated.
	RoleName	Specifies the role for which the alarm was generated.
	HostName	Specifies the host for which the alarm was generated.
Additional Information	Trigger Condition	Specifies the alarm triggering condition.

Impact on the System

Data write is blocked and the write operation performance is affected.

Possible Causes

The IoTDB cross-space merge task on the node is slow. You need to further analyze logs.

Handling Procedure

Collect fault information.

Log in to FusionInsight Manager, choose O&M > Alarm > Alarms. In the real-time alarm list, click in front of this alarm and view the role name and instance IP address in Location.
Choose O&M > Log > Download.
Expand the Service drop-down list, select IoTDB for the target cluster, and click OK.
Expand the Hosts drop-down list. In the Select Host dialog box that is displayed, select the host queried in 1, and click OK.
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.