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optimize: handing saga transaction timeout #2215
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Codecov Report
@@ Coverage Diff @@
## develop #2215 +/- ##
=============================================
- Coverage 53.92% 53.92% -0.01%
Complexity 2620 2620
=============================================
Files 490 490
Lines 15346 15350 +4
Branches 1751 1752 +1
=============================================
+ Hits 8276 8277 +1
- Misses 6288 6291 +3
Partials 782 782 |
slievrly
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Feb 5, 2020
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LGTM
zhangthen
approved these changes
Feb 7, 2020
booogu
pushed a commit
to booogu/seata
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this pull request
Feb 12, 2020
* handing saga transaction timeout * handing saga transaction timeout Co-authored-by: xingfudeshi <xingfudeshi@vip.qq.com> Co-authored-by: Xin Wang <xin.victorwang@gmail.com> Co-authored-by: zjinlei <75718677@qq.com>
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Ⅰ. Describe what this PR did
When a transaction timeout occurs, the server will keep sending "rollback requests":
How to tell if the Saga transaction has timed out? Determine whether the time of stateMachineInstance.gmtUpdated exceeds the timeout period
Timeouts are:
* Timeout due to application crashed
* Timeout occurred due to message congestion during asynchronous execution
* Synchronous execution time is too long
* Asynchronous execution time is too long
Handing timeout:
1. When the server retries, the state machine determine whether the Saga transaction has timed out. If there is no timeout, the execution is rejected. If the timeout expires, the execution is allowed.
2. Before each service is executed, determines whether the Saga transaction has timed out. If it times out, stop execution directly and wait for the server to retry.
Ⅳ. Describe how to verify it
seata/test/src/test/java/io/seata/saga/engine/db/StateMachineDBTests.java
method testStateMachineTransTimeout and testStateMachineTransTimeoutAsync