After OOM and recovery from OOM without restart, ServerList not updated

[HashJang]

ThreadStack:

"PollingServerListUpdater-1" Id=157 WAITING on java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync@3adcda2
    at java.base@11.0.4/jdk.internal.misc.Unsafe.park(Native Method)
    -  waiting on java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync@3adcda2
    at java.base@11.0.4/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
    at java.base@11.0.4/java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:885)
    at java.base@11.0.4/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:917)
    at java.base@11.0.4/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1240)
    at java.base@11.0.4/java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:959)
    at com.netflix.loadbalancer.BaseLoadBalancer.setServersList(BaseLoadBalancer.java:475)
    at com.netflix.loadbalancer.DynamicServerListLoadBalancer.setServersList(DynamicServerListLoadBalancer.java:156)
    at com.netflix.loadbalancer.DynamicServerListLoadBalancer.updateAllServerList(DynamicServerListLoadBalancer.java:267)
    at com.netflix.loadbalancer.DynamicServerListLoadBalancer.updateListOfServers(DynamicServerListLoadBalancer.java:250)
    at com.netflix.loadbalancer.DynamicServerListLoadBalancer$1.doUpdate(DynamicServerListLoadBalancer.java:62)
    at com.netflix.loadbalancer.PollingServerListUpdater$1.run(PollingServerListUpdater.java:116)
    at java.base@11.0.4/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base@11.0.4/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
    at java.base@11.0.4/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
    at java.base@11.0.4/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base@11.0.4/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base@11.0.4/java.lang.Thread.run(Thread.java:834)

    Number of locked synchronizers = 1
    - java.util.concurrent.ThreadPoolExecutor$Worker@6ab1c5f9

allServerLock is an Reentrant Lock and the read lock is acquired while read server list and ping each server. However, the code of reading server list has risk that not release lock while OOM:

BaseLoadBalancer.java

                allLock = allServerLock.readLock();
                allLock.lock();
                allServers = allServerList.toArray(new Server[allServerList.size()]);
                allLock.unlock();