Chu Tong created HDFS-4492:
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Summary: NameNodeConnector should prevent other balancers to run
while the one is running
Key: HDFS-4492
URL: https://issues.apache.org/jira/browse/HDFS-4492
Project: Hadoop HDFS
Issue Type: Bug
Components: balancer
Affects Versions: 2.0.2-alpha
Reporter: Chu Tong
Priority: Minor
private OutputStream checkAndMarkRunningBalancer() throws IOException {
try {
final DataOutputStream out = fs.create(BALANCER_ID_PATH);
out.writeBytes(InetAddress.getLocalHost().getHostName());
out.flush();
return out;
} catch(RemoteException e) {
...
In the code, fs.create should set overwrite bit to false so that other balancer
can't run while one is running.
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