private static GCStatus fetchGcStatus() {
GCStatus result = null;
HostAndPort address = null;
try {
// Read the gc location from its lock
ZooReaderWriter zk = ZooReaderWriter.getInstance();
String path = ZooUtil.getRoot(instance) + Constants.ZGC_LOCK;
List<String> locks = zk.getChildren(path, null);
if (locks != null && locks.size() > 0) {
Collections.sort(locks);
address =
new ServerServices(
new String(zk.getData(path + "/" + locks.get(0), null), StandardCharsets.UTF_8))
.getAddress(Service.GC_CLIENT);
GCMonitorService.Client client =
ThriftUtil.getClient(
new GCMonitorService.Client.Factory(), address, config.getConfiguration());
try {
result = client.getStatus(Tracer.traceInfo(), SystemCredentials.get().toThrift(instance));
} finally {
ThriftUtil.returnClient(client);
}
}
} catch (Exception ex) {
log.warn("Unable to contact the garbage collector at " + address, ex);
}
return result;
}
