Change Details

We had a variety of issues in the syncroton handling code: * Race conditions where sometimes we wouldn't detect changes or attempt duplicate inserts * Invalid handling of an empty set of members in the cache (use of empty instead of isset) * Invalid resetting of the cache before reading, resulting in duplicate inserts The solution is somewhat messy because we really shouldn't be using timestamps for this, but rather attach the information to the syncstate, but this seems to fix most of the issues and gets the test to reliably pass. Supersedes https://git.kolab.org/D4896

Fix race condition in relation state handling Make sure we use the same timestamp to insert the new syncroton_relations_state entry even if we execute this multiple times. Not using a current timestamp and instead using the sync timestamp isn't strictily necessary, but makes the execution more deterministic (less moving parts). It's either way racy, which is going to be addressed in a separate commit. Checking for empty leads to duplicate inserts when the new set of members is empty Avoid resetting the cache on read Otherwise our check which makes sure that we don't insert twice doesn't work. Deal with collisions in the cache Adjust cleanup to preserve the "before" timestamp.

We had a variety of issues in the syncroton handling code:Fix race condition in relation state handling Make sure we use the same timestamp to insert the new syncroton_relations_state entry even if we execute this multiple times. Not using a current timestamp and instead using the sync timestamp isn't strictily necessary, but makes the execution more deterministic * Race conditions where sometimes we wouldn't detect changes or attempt duplicate inserts(less moving parts). It's either way racy, which is going to be * Invalid handling of an empty set of members in the cache (use of empty instead of isset)addressed in a separate commit. Checking for empty leads to duplicate inserts when the new set of members is empty Avoid resetting the cache on read Otherwise our check which makes sure that we don't insert twice doesn't * Invalid resetting of the cache before reading, resulting in duplicate insertswork. The solution is somewhat messy because we really shouldn't be using timestamps for this, but rather attach the information to the syncstate, but this seems to fix most of the issues and gets the test to reliably pass.Deal with collisions in the cache Supersedes https://git.kolab.org/D4896Adjust cleanup to preserve the "before" timestamp.