Github user chtyim commented on a diff in the pull request:
https://github.com/apache/incubator-tephra/pull/23#discussion_r91463607
--- Diff:
tephra-core/src/main/java/org/apache/tephra/TransactionManager.java ---
@@ -958,25 +983,31 @@ private void doAbort(long writePointer, long[]
checkpointWritePointers, Transact
// makes tx visible (assumes that all operations were rolled back)
// remove from in-progress set, so that it does not get excluded in
the future
InProgressTx removed = inProgress.remove(writePointer);
+ boolean isInvalid = false;
if (removed == null) {
// tx was not in progress! perhaps it timed out and is invalid? try
to remove it there.
if (invalid.rem(writePointer)) {
+ isInvalid = true;
// remove any invalidated checkpoint pointers
// this will only be present if the parent write pointer was also
invalidated
if (checkpointWritePointers != null) {
- for (int i = 0; i < checkpointWritePointers.length; i++) {
- invalid.rem(checkpointWritePointers[i]);
+ for (long checkpointWritePointer : checkpointWritePointers) {
+ invalid.rem(checkpointWritePointer);
}
}
invalidArray = invalid.toLongArray();
LOG.info("Tx invalid list: removed aborted tx {}", writePointer);
- // removed a tx from excludes: must move read pointer
- moveReadPointerIfNeeded(writePointer);
}
- } else {
- // removed a tx from excludes: must move read pointer
- moveReadPointerIfNeeded(writePointer);
}
+ if (!isInvalid) {
--- End diff --
I found this variable name less clear on the actual action. Probably better
call it `removeInProgressCheckpoints`? Because it is actually what the
condition is about. It seems less clear to me why "not invalid" means something
needs to be removed from the inprogress when reading this part of the code. I
have to trace back to see how this variable is being set. If the variable is
"removeInProgressCheckpoints", it's more obvious that removal needs to be
performed here and I can optionally trace the code if I am interested in how it
is being set.
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