Problem Your query returns an object which is a class , but for some reason you can’t use it as an entity Solution: The Class public class MY_CLASS { long a; String b; } In the M...

  Copy the .war file to /tomcat/wars folder (i.e /tomcat/wars) In tomcat/apps create a new folder to where the war will be opened : **tomcat/apps/myapps ** In tomcat/conf/server.xml , ...

Unfortunately , we reached the conclusion that HBase is still not stable enough for us to use in production environment. I think it’s a great project , and I’m certain that it will become a very im...

After a lengthy discussion with St.Ack (on the hbase channel in the mirc) and Jean Daniel about this bug , we currently believe that what we’re seeing is “ … a fumble of regionstate somehow.  The m...

We assumed that the bug was caused mainly because of the high load rate , and that once the bulk of the data will be in HBase and the load will drop considerably , we won’t see it again. Unfortuna...

As you remember , HBase tends to collapse (Return”NotServingRegionException”) after a few millions of files (Latest crash: 6 million). Since we (want to) believe this only happens because of the ra...

We’ve been working on the previous bug (last post) for a few days now , but unfortunately nothing is working. We’ve suspected the error might be caused by wrong insertion sequence on our side , but...

We’ve tried loading the system with 10,000 , 100,000 and 200,000 files - everything worked perfectly. We then moved on to running the full benchmark (11,00,000). After approx 400,000 files , HBase...

Today we started the production-mode experiemnts. In phase 1 we will have only 4 servers: A: 80 GB , 8 GB Ram - will contain the Hadoop NN and Hbase Master B: 45 GB , 4GB Ram - will contain the S...

We are planning to move on to production soon , and we intend to build a test environment that will resemble the production environment as close as possible. We will begin with 5 dedicated Linux m...