sink/mysql: rollback txn to recycle db conn, refine timeout param in …

…db conn (pingcap#1279) (pingcap#1286)

Signed-off-by: ti-srebot <[email protected]>

sink/mysql: rollback txn to recycle db conn, refine timeout param in …

…db conn (pingcap#1279) (pingcap#1285)

Signed-off-by: ti-srebot <[email protected]>

owner: fix memory accumulated when owner consume etcd update slow (pi…

…ngcap#1224)

kv: fix unexpected skipping in batch resolved ts (pingcap#1037)

Signed-off-by: 5kbpers <[email protected]>

Merge remote-tracking branch 'origin/master' into release-4.0

Merge branch 'master' into release-4.0

Merge branch 'master' into release-4.0

mounter: ignore the error when the index info is not found (pingcap#777…

…) (pingcap#780)

mounter: ignore the error when the index info is not found (pingcap#777…

…) (pingcap#780)

puller: support to decrease ts for frontier (pingcap#654)