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	Auto Cleared
45595	Major	Yes

Alarm Parameters

Parameter	Description
Source	Specifies the cluster for which the alarm is 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.

Impact on the System

Data writes are blocked, which causes write performance deterioration.

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 and 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 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 personnel and provide the collected logs.