@Override
public Boolean call() throws Exception {
long timeoutMillis = 5000;
try {
getServersFile();
getZkRunning();
while (true) {
while (!restartQueue.isEmpty()) {
LOG.debug("Restart queue size [" + restartQueue.size() + "]");
RestartHandler handler = restartQueue.poll();
Future<ScriptContext> runner = pool.submit(handler);
ScriptContext scriptContext = runner.get(); // blocking call
if (scriptContext.getExitCode() != 0) restartQueue.add(handler);
}
try {
Thread.sleep(timeoutMillis);
} catch (InterruptedException e) {
}
}
} catch (Exception e) {
e.printStackTrace();
LOG.error(e);
pool.shutdown();
throw e;
}
}
private synchronized void restartServer(String znodePath) throws Exception {
String child =
znodePath.replace(
parentZnode + Constants.DEFAULT_ZOOKEEPER_ZNODE_SERVERS_RUNNING + "/", "");
Scanner scn = new Scanner(child);
scn.useDelimiter(":");
String hostName = scn.next();
String instance = scn.next();
int infoPort = Integer.parseInt(scn.next());
long serverStartTimestamp = Long.parseLong(scn.next());
scn.close();
LOG.error("WmsServer [" + hostName + ":" + instance + "] failed.");
if (runningServers.contains(child)) {
LOG.debug("Found [" + child + "], deleting from running servers list");
runningServers.remove(child);
metrics.setTotalRunning(runningServers.size());
}
RestartHandler handler = new RestartHandler(child);
restartQueue.add(handler);
}