[IOTDB-5218] DataNode should marked started successfully until the region is assigned

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.0.0
• Labels: DataNode
• Sprint: 2022-12-ConfigNode
• Assignee: Yongzao Dan
• Reporter: Xiangdong Huang
• Created: 14/Dec/22 14:37
• Updated: 04/Jan/23 08:08
• Resolved: 01/Jan/23 08:04

Description

A scenario:

• start a configNode
• start a datanode immediatelly
• write data immediatelly

Then there will be error:

org.apache.iotdb.commons.exception.IoTDBException: ConfigNode failed to extend Region because there are not enough DataNodes

 

Can use the following codes to reproduct:

IoTDBService service = IoTDBService.getInstance();
service.startConfigNodeService();
IoTDBService.getInstance().startDataNodeService();
long time = System.currentTimeMillis();
IoTDBService.getInstance().insertRecord("root.test.d1", time,
    Collections.singletonList("s1"), Collections.singletonList("1.0")); 

IoTDBService is a wrapper to wrap CongfigNode's main() and DataNode's main().

 

IMO, the datanode server is really ready only when there is a region for it.

Besides, if the process is time consuming, we can add a status check method to check whether datanode is ready.