Tsz-wo Sze created RATIS-2336:
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Summary: PeerProxyMap.getProxy() could return null
Key: RATIS-2336
URL: https://issues.apache.org/jira/browse/RATIS-2336
Project: Ratis
Issue Type: Bug
Components: util
Reporter: Tsz-wo Sze
Assignee: Tsz-wo Sze
{code}
//PeerProxyMap.java
PROXY getProxy() throws IOException {
if (proxy == null) {
synchronized (this) {
if (proxy == null) {
final LifeCycle.State current = lifeCycle.getCurrentState();
if (current.isClosingOrClosed()) {
throw new AlreadyClosedException(name + " is already " + current);
}
lifeCycle.startAndTransition(
() -> proxy = createProxyImpl(peer), IOException.class);
}
}
}
return proxy;
}
{code}
It the code above, the proxy is returned outside synchronized (this). Then, it
is possible that proxy is set to null before returning.
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