in src/main/java/com/googlesource/gerrit/plugins/validation/dfsrefdb/zookeeper/ZkSharedRefDatabase.java [108:116]
public Locker lockRef(Project.NameKey project, String refName) throws GlobalRefDbLockException {
InterProcessMutex refPathMutex =
new InterProcessMutex(client, "/locks" + pathFor(project, refName));
try {
return new Locker(refPathMutex, transactionLockTimeOut, MILLISECONDS);
} catch (Exception e) {
throw new GlobalRefDbLockException(project.get(), refName, e);
}
}