1. Abnormal

Workflow module jar package startup error:

2021-02-14 13:45:13.735 [main] INFO  liquibase - Waiting for changelog lock....
2021-02-14 13:45:23.739 [main] INFO  liquibase - Waiting for changelog lock....
2021-02-14 13:45:33.744 [main] INFO  liquibase - Waiting for changelog lock....
2021-02-14 13:45:43.750 [main] INFO  liquibase - Waiting for changelog lock....
2021-02-14 13:45:53.755 [main] INFO  liquibase - Waiting for changelog lock....
2021-02-14 13:46:03.762 [main] INFO  liquibase - Waiting for changelog lock....
2021-02-14 13:46:13.767 [main] INFO  liquibase - Waiting for changelog lock....
2021-02-14 13:46:23.773 [main] INFO  liquibase - Waiting for changelog lock....

2. Reasons

Some log tables of the workflow table are locked, which may be caused by the exception that the program was not terminated normally last time.

3. Learn from the online saying that the table is locked. Just unlock it. You can execute the following statement, but you will be prompted that the table cannot be found or does not exist

#Check the locked sheet
SELECT * FROM DATABASECHANGELOGLOCK;
#Unlock
UPDATE DATABASECHANGELOGLOCK SET locked=0, lockgranted=null, lockedby=null WHERE id=1

4. Solution (check all tables ending with databasechangelock, and modify as shown in Figure 2)

Figure 1

Figure 2