By using AWS re:Post, you agree to the Terms of Use

DMS and Terraform


We have a DMS task for reading data from MySQL and exporting data to S3 , which is created and updated by Terraform . The updations to the task are about adding tables to the list . Everytime such an update is deployed through Terraform , the task changes its state to Stopped . If we try to resume the task , it fails with the errors

2022-09-17T12:27:44 [SOURCE_CAPTURE ]E: Error 1236 reading binlog, exit after 11 retries [1020493] (mysql_endpoint_capture.c:1152) 2022-09-17T12:27:44 [SOURCE_CAPTURE ]E: Error 1236 (Could not find first log file name in binary log index file) reading binlog [1020493] (mysql_endpoint_capture.c:1153)

Restarting the task works fine though. I am guessing the pointer to the binlog file is lost somehow . Note , no changes are being done on the MYSQL end .

Any pointers on how to avoid this problem , while using Terraform ?

2 Answers

Hi! Looking at the docs there is a note which seems relevant:

NOTE: Changing most arguments will stop the task if it is running. You can set start_replication_task to resume the task afterwards.

Unfortunately, the docs don't indicate the type of the parameter so I suggest you look at your state to see if it should be start_replication_task = true or something else.

Hope this helps!

profile picture
answered 11 days ago
  • Yes, but I think the pointer to the binary log is getting lost, in which case its unable to resume


Whenever you Stop and Resume an AWS DMS task, it resumes from the position where it was paused. Meaning, if you resume the task after X minutes, AWS DMS task will try to get the changes since it was paused by reading the Binary Logs. Looking at the error, it looks like the task was not able to find the required Binary Logs to resume the replication.

If you happen to Stop the DMS task, make sure that the DB host has all the required Binary Logs available so that the task can be successfully resumed.

answered 11 days ago
  • Ya you are right , I suspect the same too .

You are not logged in. Log in to post an answer.

A good answer clearly answers the question and provides constructive feedback and encourages professional growth in the question asker.

Guidelines for Answering Questions