2.DO I need to check whether Hconnection is still active before using it to create Htable instance.
By still valid I meant that say I created Hconnection object and after 3-4 minutes when request came for any crud operation for some table and before getting Htable using from HConnection say Hconnection object or TCP/IP connection to cluster dropped. Does now if I create Htable using HConnection will it recrete the TCP connection to cluster automatically? 1.And will increasing no of HConnectoions will improve the performance? Thanks! On Sun, Mar 13, 2016 at 7:47 PM, Ted Yu <yuzhih...@gmail.com> wrote: > For #1, single Hconnection should work. > > For #2, can you clarify ? As long as the hbase-site.xml used to create > the Hconnection > is still valid, you can continue using the connection. > > For #3, they're handled by the connection automatically. > > For #4, the HTable ctor you cited doesn't exist in master branch. > You can control the following parameters for the ThreadPoolExecutor - see > HTable#getDefaultExecutor(): > > int maxThreads = conf.getInt("hbase.htable.threads.max", Integer. > MAX_VALUE); > > if (maxThreads == 0) { > > maxThreads = 1; // is there a better default? > > } > > int corePoolSize = conf.getInt("hbase.htable.threads.coresize", 1); > > long keepAliveTime = conf.getLong("hbase.htable.threads.keepalivetime", > 60); > > On Sun, Mar 13, 2016 at 3:12 AM, Shushant Arora <shushantaror...@gmail.com > > > wrote: > > > I have a requirement to use long running hbase client in application > > server. > > > > 1.Do I need to create multiple HConnections or single Hconnection will > > work? > > 2. DO I need to check whether Hconnection is still active before using it > > to create Htable instance. > > 3.DO I need to handle region split and regionserver changes while using > > Hconnection or are they handled automatically. > > 4.Whats the use of thread pool in Htable instance. > > ExecutorService threadPool; > > HTable h = new HTable(conf, Bytes.toBytes("tablename"), threadPool); > > > > > > Thanks! > > >