Fix a bug in sync caches where memory usage kept increasing when the eviction listener is set (v0.9.x) #296
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This PR fixes a bug in
sync::Cacheandsync::SegmentedCache, which causes eviction listener's key-level locks not to be removed after sending notifications. This happened only when theImmediatenotification delivery mode is used for the eviction listener. (It is the default mode) Another mode,Queuedmode, is unaffected as it does not use the key locks.These key locks are stored in an internal
moka::cht::SegmentedHashMapwithArc<K>as their keys. So this bug caused theSegmentedHashMapto hold all keysKthat has been inserted to the cache. It will continuously increasing memory usage until the cache is dropped.Tested the fix by adding a check to unit test if the
SegmentedHashMapis empty after sending all notifications.