We needed calls to come back (or timeout) in less than 50ms. That was low for hbase.rpc.timeout .
On Thu, Dec 15, 2011 at 9:30 PM, Steve Boyle <[email protected]>wrote: > Shrijeet, > > What do you consider a very low value for hbase.rpc.timeout? > > Thanks, > Steve > > -----Original Message----- > From: Shrijeet Paliwal [mailto:[email protected]] > Sent: Thursday, December 15, 2011 9:03 PM > To: [email protected] > Subject: Re: understanding hbase client timeout settings > > Steve, > > We have been using timeouts in production via two different methods: > > 1. Use RPC timeout mechanism provided by HBase client. For this you will > need both 2937 and 3154. We backported 2937 to 0.90.3. The reason 3154 > alone does not help is because if you set the conf parameter introduced in > 3154 (hbase.rpc.timeout) to a very low value your calls to meta (ROOT and > META) tables timeout all the time and almost no request go through. That is > where 2937 comes in. It uses hbase.client.operation.timeout knob for all > RPC calls except the ones made to meta tables. > > 2. Use an async method (example ExecutorService with timeout) to make HBase > client calls. > > In our experience #1 perform better (in terms of % calls timing out). > > Having said that I am still interested to hear comments from experts. I > personally was not able to grasp reasoning behind introduction of > hbase.client.operation.timeout configuration parameter. > > -Shrijeet > > On Thu, Dec 15, 2011 at 3:15 PM, Steve Boyle <[email protected]> > wrote: > > > > Hi, > > > > I'm trying to understand what timeout controls are available in the hbase > client. I'm using hbase version 0.90.4-cdh3u2. I have a client > application that does gets, puts, increments and scans. I'd like to be > able to have a client side timeout such that the client can clean-up in a > case where the response is taking a while for whatever reason. > > > > I've seen this jira which indicates that the feature I'm looking for is > coming in a future release: > > https://issues.apache.org/jira/browse/HBASE-2937 > > > > I've also seen this jira that looks related and appears to be already > available: > > https://issues.apache.org/jira/browse/HBASE-3154 > > > > What is the best way to control a timeout for the hbase client? > > > > Thanks, > > Steve > > > > > > >
