Sounds like #1 is not HBase issue, but HBql issue.
http://www.hbql.com/xref/org/apache/hadoop/hbase/hbql/impl/MappingManager.html
May be this method should be synchronized:
*public* *void* validatePersistentMetadata() *throws* HBqlException {
On Mon, Apr 12, 2010 at 2:20 PM, Something Something <
mailinglist...@gmail.com> wrote:
> I run into the following two issues related to HBase all the time, and
> therefore am wondering if there are any permanent fixes for these:
>
> 1) When I start Hadoop & HBase for the first time, and run a single job it
> runs successfully; but when I fire 2 (or more) jobs only one of them runs
> successfully and the other one fails with exception saying... "table
> system_mappings" doesn't exist. Seems like some type of race condition.
> How do I bring up HBase with 'system_mappings' table already built? Or, how
> do I avoid running into this issue?
>
> 2) After 30 minutes or so on in-activity, HBase (or may be Zookeeper) stops
> working. I have to restart it. How do I ensure that it always stays up?
>
> Thanks for the help.
>
>
