yexiaowei created IGNITE-21926:
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Summary: The status of GridCacheLockImpl and
GridCacheSemaphoreImpl may be inconsistent
Key: IGNITE-21926
URL: https://issues.apache.org/jira/browse/IGNITE-21926
Project: Ignite
Issue Type: Bug
Components: data structures
Reporter: yexiaowei
I noticed that GridCacheLockImpl and GridCacheSemaphoreImpl can cause
deadlocks. Because their model is similar to the following
Sync sync;
void init() {
sync = getSync();
}
void onUpdate(val) {
if(sync == null) {
return;
}
update(sync);
}
If init and onUpdate occur at the same time, update may be missed and lagging
data may be obtained. The fix I gave is similar to:
Sync sync;
boolean flag = false;
void init() {
do {
flag = false;
s = getSync();
} while(flag);
}
void onUpdate(val) {
if(sync == null) {
flag = true;
return;
}
update(sync);
}
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