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Posted to hdfs-issues@hadoop.apache.org by "Chu Tong (JIRA)" <ji...@apache.org> on 2013/02/12 19:07:12 UTC
[jira] [Updated] (HDFS-4492) NameNodeConnector should prevent other
balancers to run while the one is running
[ https://issues.apache.org/jira/browse/HDFS-4492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chu Tong updated HDFS-4492:
---------------------------
Attachment: HDFS-4492.patch
> 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
> Attachments: HDFS-4492.patch
>
>
> 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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