package deadlock

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• rpc Detect (stream DeadlockRequest, stream DeadlockResponse)

  deadlock.proto:81

  Detect should only sent to the owner. only be handled by the owner. The DeadlockResponse is sent back only if there is deadlock detected. CleanUpWaitFor and CleanUp doesn't return responses.

  message DeadlockRequest

  deadlock.proto:55

  • DeadlockRequestType tp = 1

  • optional WaitForEntry entry = 2

  • optional ReplaceLocksByKeysRequest replace_locks_by_keys = 3

  message DeadlockResponse

  deadlock.proto:61

  • optional WaitForEntry entry = 1

    The same entry sent by DeadlockRequest, identifies the sender.

  • uint64 deadlock_key_hash = 2

    The key hash of the lock that is hold by the waiting transaction. The hash of the `deadlock_key` field.

  • repeated WaitForEntry wait_chain = 3

    The other entries of the dead lock circle. The current entry is in `entry` field and not included in this field.

  • bytes deadlock_key = 4

    The key of the lock that is hold by the waiting transaction.

• rpc GetWaitForEntries (WaitForEntriesRequest, WaitForEntriesResponse)

  deadlock.proto:76

  Get local wait for entries, should be handle by every node. The owner should sent this request to all members to build the complete wait for graph.

  message WaitForEntriesRequest

  deadlock.proto:15

  (message has no fields)

  message WaitForEntriesResponse

  deadlock.proto:17

  • repeated WaitForEntry entries = 1

Used in: DeadlockRequest

• Detect = 0

• CleanUpWaitFor = 1

  CleanUpWaitFor cleans a single entry the transaction is waiting.

• CleanUp = 2

  CleanUp cleans all entries the transaction is waiting.

Used in: ReplaceLocksByKeysRequest

• uint64 key_hash = 1

• bytes key = 2

• uint64 old_lock_ts = 3

• uint64 new_lock_ts = 4

Used in: DeadlockRequest

• repeated ReplaceLockByKeyItem items = 1

Used in: DeadlockRequest, DeadlockResponse, WaitForEntriesResponse, kvrpcpb.Deadlock, kvrpcpb.GetLockWaitHistoryResponse, kvrpcpb.GetLockWaitInfoResponse

• uint64 txn = 1

  The transaction id that is waiting.

• uint64 wait_for_txn = 2

  The transaction id that is being waited for.

• uint64 key_hash = 3

  The hash value of the key is being waited for.

• bytes key = 4

  The key the current txn is trying to lock.

• bytes resource_group_tag = 5

  The tag came from the lock request's context.

• uint64 wait_time = 6

  Milliseconds it has been waits.