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https://issues.apache.org/jira/browse/HDFS-7740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14328679#comment-14328679
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Yi Liu edited comment on HDFS-7740 at 2/20/15 8:47 AM:
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Thanks [~shv] for your comments. I will address them later, currently I'am on
holiday for Chinese traditional new year, so there is some delay for the update.
{quote}
I don't think your new tests will work with the ones existing in
TestFileTruncate, because you are restarting the whole cluster
{quote}
Oh, not noticed these before :) I thought if I use a different Mini DFS Cluster
with different ports, then they will not affect each other.
{quote}
I would propose to put your new cases into a new file
It would be good to start the cluster once in @BeforeClass, and make sure all
DNs are up after each test case.
I think this is possible as you do not need to reformat the cluster after each
test
{quote}
Good idea, I will move them to a new class. Yes, we don't need to reformat the
cluster.
{quote}
With DNs restarting one way to accelerate test running time is to shorten
heartbeats, as we did in TestFileTruncate.
{quote}
We already use the short hearbeats for the new test.
was (Author: hitliuyi):
Thanks [~shv] for your comments. I will address them later, currently I'am on
holiday for Chinese traditional new year, so there is some delay for the update.
{quote}
I don't think your new tests will work with the ones existing in
TestFileTruncate, because you are restarting the whole cluster
{quote}
Oh, not noticed these before :) I thought if I use a different Mini DFS Cluster
with different ports, then they will not affect each other.
{quote}
I would propose to put your new cases into a new file
I think this is possible as you do not need to reformat the cluster after each
test
{quote}
Good idea, I will move them to a new class. Yes, we don't need to reformat the
cluster.
{quote}
It would be good to start the cluster once in @BeforeClass, and make sure all
DNs are up after each test case.
{quote}
To make sure all DNs are up after each test case, I think we are referring to
use @Before instead of @BeforeClass
{quote}
With DNs restarting one way to accelerate test running time is to shorten
heartbeats, as we did in TestFileTruncate.
{quote}
We already use the short hearbeats for the new test.
> Test truncate with DataNodes restarting
> ---------------------------------------
>
> Key: HDFS-7740
> URL: https://issues.apache.org/jira/browse/HDFS-7740
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: test
> Affects Versions: 2.7.0
> Reporter: Konstantin Shvachko
> Assignee: Yi Liu
> Fix For: 2.7.0
>
> Attachments: HDFS-7740.001.patch
>
>
> Add a test case, which ensures replica consistency when DNs are failing and
> restarting.
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