OOMERegionServer

[Ted Yu <yu...@gmail.com>]

Hi,
I came across this class (in
trunk): hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/OOMERegionServer.java

I don't see where OOMERegionServer is used.

Does someone know ?

Thanks

Re: OOMERegionServer

[Ted Yu <yu...@gmail.com>]

I saw the comments.

When I tried to start OOMERegionServer on Mac, I first got (using the
sample command from javadoc):

TYus-MacBook-Pro:trunk tyu$ bin/hbase
org.apache.hadoop.hbase.OOMERegionServer start
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/hadoop/hbase/OOMERegionServer
Caused by: java.lang.ClassNotFoundException:
org.apache.hadoop.hbase.OOMERegionServer
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

I then corrected class name:

TYus-MacBook-Pro:trunk tyu$ bin/hbase
org.apache.hadoop.hbase.regionserver.OOMERegionServer start
2014-01-07 07:09:38,852 WARN  [main] regionserver.HRegionServerCommandLine:
Not starting a distinct region server because hbase.cluster.distributed is
false

Since OOMERegionServer is in test tree, I wonder how people would use it.

Cheers


On Mon, Jan 6, 2014 at 9:58 PM, ramkrishna vasudevan <
ramkrishna.s.vasudevan@gmail.com> wrote:

> I hope you saw that java doc.  Just in case you have not seen
> /**
>  * A region server that will OOME.
>  * Everytime {@link #put(regionName, Durability)} is called, we add
>  * keep around a reference to the batch.  Use this class to test OOME
> extremes.
>  * Needs to be started manually as in
>  * <code>${HBASE_HOME}/bin/hbase ./bin/hbase
> org.apache.hadoop.hbase.OOMERegionServer start</code>.
>  */
>
> So I think this is for testing the OOME cases only and not directly used
> anywhere.  If I am  not right about the actual intent, pardon me.
>
> Regards
> Ram
>
>
> On Tue, Jan 7, 2014 at 11:10 AM, Ted Yu <yu...@gmail.com> wrote:
>
> > Hi,
> > I came across this class (in
> > trunk):
> >
> hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/OOMERegionServer.java
> >
> > I don't see where OOMERegionServer is used.
> >
> > Does someone know ?
> >
> > Thanks
> >
>

Re: OOMERegionServer

[ramkrishna vasudevan <ra...@gmail.com>]

I hope you saw that java doc.  Just in case you have not seen
/**
 * A region server that will OOME.
 * Everytime {@link #put(regionName, Durability)} is called, we add
 * keep around a reference to the batch.  Use this class to test OOME
extremes.
 * Needs to be started manually as in
 * <code>${HBASE_HOME}/bin/hbase ./bin/hbase
org.apache.hadoop.hbase.OOMERegionServer start</code>.
 */

So I think this is for testing the OOME cases only and not directly used
anywhere.  If I am  not right about the actual intent, pardon me.

Regards
Ram


On Tue, Jan 7, 2014 at 11:10 AM, Ted Yu <yu...@gmail.com> wrote:

> Hi,
> I came across this class (in
> trunk):
> hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/OOMERegionServer.java
>
> I don't see where OOMERegionServer is used.
>
> Does someone know ?
>
> Thanks
>