There are a series of patches that address this, check the recent commit
history of append branch.
On Mar 7, 2011 1:52 AM, "Gokulakannan M" <gok...@huawei.com> wrote:
> Hi All,
>
>
>
> In HBase 0.90 I have seen that it has a fault tolerant behavior
> of triggering lease recovery and closing the file when the writer dies in
> the middle. Yet does hbase have any workaround/recovery when Namenode is
> restarted in the middle of the file write(possibly the HLog file , after
> some syncs)???
>
> I faced a problem in the above scenario. When the NN is
> restarted(but not DN), the following code goes into infinite loop as lease
> recovery is not at all happening. But once the DN is restarted, the file
can
> be recovered successfully(I think the DN is not sending those partial
blocks
> in blocksBeingWritten to NN when only NN is restarted).
>
>
>
> // Recover the files lease if necessary
> boolean recovered = false;
> while (!recovered) {
> try {
> FSDataOutputStream out = fs.append(logfiles[i].getPath());
> out.close();
> recovered = true;
> } catch (IOException e) {
> if (LOG.isDebugEnabled()) {
> LOG.debug("Triggering lease recovery.");
> }
> try {
> Thread.sleep(leaseRecoveryPeriod);
> } catch (InterruptedException ex) {
> // ignore it and try again
> }
> }
>
>
>
>
>
> Thanks,
>
> Gokul
>
>
>
>
>
>
>
>
>
