Asaf: Your coprocessor was successfully running prior to the schema change ?
See HBASE-6873 <https://issues.apache.org/jira/browse/HBASE-6873> Clean up Coprocessor load failure handling. Cheers On Mon, Dec 10, 2012 at 5:11 AM, Mesika, Asaf <[email protected]> wrote: > I guess I'm missing something in the sequence of actions here: > > 1. I'm disabling the table. This action is synchronous. > 2. I'm running the method hBaseAdmin.modifyTable(), which is *asynchronous* > 3. I'm supposed to use hBaseAdmin.getAlterStatus() to check every x > seconds whether all regions have been modified. > 4. Once that has passed, I can finally enable the table, which is a > synchronous action. This should signify that the table's region are online, > thus have loaded the region observer class and instantiated it - meaning, > it has found the JAR file specified in its HDFS location. > > hasCoprocessor just checks whether the metadata object has the coprocessor > attribute and it if has the className you supplied to it. > How can I know that if a classname is present on a HTableDescriptor, then > al the tables's regions successfully instantiated the region observer? > > > > On Dec 10, 2012, at 10:01 AM, anil gupta wrote: > > > Hi Asaf, > > > > Have a look at the > > *hasCoprocessor< > http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/HTableDescriptor.html#hasCoprocessor%28java.lang.String%29 > > > > * method of HTD: > > > http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/HTableDescriptor.html#hasCoprocessor(java.lang.String) > > > > It might be helpful for you. I have used it in past to check whether a > > coprocessors is successfully added or not. > > > > HTH, > > Anil > > > > On Sun, Dec 9, 2012 at 2:25 PM, Ted Yu <[email protected]> wrote: > > > >> On region server web UI, you should see the list of coprocessors loaded. > >> > >> But I guess you're looking for a programmatic way of detecting > coprocessor > >> deployment. > >> > >> Cheers > >> > >> On Sun, Dec 9, 2012 at 12:29 PM, Mesika, Asaf <[email protected]> > >> wrote: > >> > >>> 0.94.0 > >>> On Dec 9, 2012, at 3:03 PM, [email protected] wrote: > >>> > >>>> Which hbase version are you targeting ? > >>>> > >>>> Thanks > >>>> > >>>> > >>>> > >>>> On Dec 9, 2012, at 2:55 AM, "Mesika, Asaf" <[email protected]> > >>> wrote: > >>>> > >>>>> Hi, > >>>>> > >>>>> I wrote a custom Region Observer. > >>>>> I'm currently writing an Installer class for it. > >>>>> In this installer I'm adding the region observer by adding a > >>> coprocessor to the HTableDescriptor, and then calling modifyTable by > >>> HBaseAdmin. > >>>>> > >>>>> My question is: How can I check whether region observer was loaded > >>> successfully for this table? > >>>>> > >>>>> I tried searching for a way to get the Coprocessor.State somehow for > >> my > >>> region observer so I'll know it's ACTIVE, but couldn't find a way. > >>>>> > >>>>> > >>>>> Thank you, > >>>>> > >>>>> Asaf > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>> > >>> > >> > > > > > > > > -- > > Thanks & Regards, > > Anil Gupta > >
