Introduction to Main Classes：
- MTMVService：MTMV services for other modules to call
- MTMVHookService：All operations that affect the MTMV
- MTMVJobManager：All operations that affect the MTMV job
- MTMVCacheManager：All operations that affect the MTMV Cache
- MTMVTask&MTMVJob：Inherit from job framework
Concurrent schema change and txn may cause dead lock. An example:
Txn T commit but not publish;
Run schema change or rollup on T's related partition, add alter replica R;
sc/rollup add a sched txn watermark M;
Restart fe;
After fe restart, T's loadedTblIndexes will clear because it's not save to disk;
T will publish version to all tablet, including sc/rollup's new alter replica R;
Since R not contains txn data, so the T will fail. It will then always waitting for R's data;
sc/rollup wait for txn before M to finish, only after that it will let R copy history data;
Since T's not finished, so sc/rollup will always wait, so R will nerver copy history data;
Txn T and sc/rollup will wait each other forever, cause dead lock;
Fix: because sc/rollup will ensure double write after the sched watermark M, so for finish transaction, when checking a alter replica:
if txn id is bigger than M, check it just like a normal replica;
otherwise skip check this replica, the BE will modify history data later.
1. generalized debug point facilities from docker suites for
fault-injection/stubbing cases
2. add segcompaction fault-injection cases for demonstration
3. add -238 TOO_MANY_SEGMENTS fault-injection case for good
Doris is not responsible for managing snapshots, but it needs to clear all
snapshots before doing backup/restore regression testing, so a property is
added to indicate that existing snapshots need to be cleared when creating a
repo.
In addition, a regression test case for backup/restore has been added.
This PR was originally #16940 , but it has not been updated for a long time due to the original author @Cai-Yao . At present, we will merge some of the code into the master first.
thanks @Cai-Yao @yiguolei
* work around, ingest binlog after backup/restore which local_tablet.partition_id is not correct, use by
req.partition_id
Signed-off-by: Jack Drogon <jack.xsuperman@gmail.com>
In some cases ( or bugs), doris may returned query to jdbc, but jdbc can not recognized what doris sent back,
so hanged. To fix this, add a timeout of 30 minutes to jdbc connection.
