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https://issues.apache.org/jira/browse/HDDS-1773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16883668#comment-16883668
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Elek, Marton edited comment on HDDS-1773 at 7/12/19 9:22 AM:
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{quote}I have expressed concern about Byteman touching ASF licensed code in
JVM. There is no clear answer if this is allowed.
{quote}
I am 100% sure that it's allowed to use at build/test time. There is no
restriction about what can you do in your memory. Restrictions applies to the
release packages.
{quote}Thought on this approach?
{quote}
Interesting idea, and can be useful in some cases but it doesn't help us to
easily inject random read/write slowness/failures during tests.
was (Author: elek):
{quote}I have expressed concern about Byteman touching ASF licensed code in
JVM. There is no clear answer if this is allowed.
{quote}
I am 100% sure that it's allowed to use at build time. There is no restriction
about what can you do in your memory. Restrictions applies to the release
packages.
{quote}Thought on this approach?
{quote}
Interesting idea, and can be useful in some cases but it doesn't help us to
easily inject random read/write slowness/failures during tests.
> Add intermittent IO disk test to fault injection test
> -----------------------------------------------------
>
> Key: HDDS-1773
> URL: https://issues.apache.org/jira/browse/HDDS-1773
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Eric Yang
> Priority: Major
> Attachments: HDDS-1773.001.patch
>
>
> Disk errors can also be simulated by setting cgroup blkio rate to 0 while
> Ozone cluster is running.
> This test will be added to corruption test project and this test will only be
> performed if there is write access into host cgroup to control the throttle
> of disk IO.
> Expected result:
> When datanode becomes irresponsive due to slow io, scm must flag the node as
> unhealthy.
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