Thanks john,Erick and Furknan. I have already defined the ping request handler in solrconfig.xml as below: <requestHandler name="/admin/ping" class="solr.PingRequestHandler"> <lst name="invariants"> <str name="qt">/select</str><!-- handler to delegate to --> <str name="q">_root_:abc</str> </lst> </requestHandler>
My question is regarding the custom query being used. Here i am querying for field _root_ which is available in all of my cluster and defined as a string field. The result for _root_:abc might not get me any match as well(i am ok with not finding any matches, the query should not be taking 10-15 seconds for getting the response). If the response comes within 1 second , then the core recovery issue is solved, hence need your suggestion if using _root_ field in custom query is fine? On Mon, Aug 5, 2019 at 2:49 AM Furkan KAMACI <furkankam...@gmail.com> wrote: > Hi, > > You can change invariants i.e. *qt* and *q* of a *PingRequestHandler*: > > <requestHandler name="/admin/ping" class="solr.PingRequestHandler"> > <lst name="invariants"> > <str name="qt">/search</str><!-- handler to delegate to --> > <str name="q">some test query</str> > </lst> > </requestHandler> > > Check documentation fore more info: > > https://lucene.apache.org/solr/7_6_0//solr-core/org/apache/solr/handler/PingRequestHandler.html > > Kind Regards, > Furkan KAMACI > > On Sat, Aug 3, 2019 at 4:17 PM Erick Erickson <erickerick...@gmail.com> > wrote: > > > You can also (I think) explicitly define the ping request handler in > > solrconfig.xml to do something else. > > > > > On Aug 2, 2019, at 9:50 AM, Jörn Franke <jornfra...@gmail.com> wrote: > > > > > > Not sure if this is possible, but why not create a query handler in > Solr > > with any custom query and you use that as ping replacement ? > > > > > >> Am 02.08.2019 um 15:48 schrieb dinesh naik <dineshkumarn...@gmail.com > >: > > >> > > >> Hi all, > > >> I have few clusters with huge data set and whenever a node goes down > its > > >> not able to recover due to below reasons: > > >> > > >> 1. ping request handler is taking more than 10-15 seconds to respond. > > The > > >> ping requesthandler however, expects it will return in less than 1 > > second > > >> and fails a requestrecovery if it is not responded to in this time. > > >> Therefore recoveries never would start. > > >> > > >> 2. soft commit is very low ie. 5 sec. This is a business requirement > so > > >> not much can be done here. > > >> > > >> As the standard/default admin/ping request handler is using *:* > queries > > , > > >> the response time is much higher, and i am looking for an option to > > change > > >> the same so that the ping handler returns the results within few > > >> miliseconds. > > >> > > >> here is an example for standard query time: > > >> > > >> ----snip--- > > >> curl " > > >> > > > http://hostname:8983/solr/parts/select?indent=on&q=*:*&rows=0&wt=json&distrib=false&debug=timing > > >> " > > >> { > > >> "responseHeader":{ > > >> "zkConnected":true, > > >> "status":0, > > >> "QTime":16620, > > >> "params":{ > > >> "q":"*:*", > > >> "distrib":"false", > > >> "debug":"timing", > > >> "indent":"on", > > >> "rows":"0", > > >> "wt":"json"}}, > > >> "response":{"numFound":1329638799,"start":0,"docs":[] > > >> }, > > >> "debug":{ > > >> "timing":{ > > >> "time":16620.0, > > >> "prepare":{ > > >> "time":0.0, > > >> "query":{ > > >> "time":0.0}, > > >> "facet":{ > > >> "time":0.0}, > > >> "facet_module":{ > > >> "time":0.0}, > > >> "mlt":{ > > >> "time":0.0}, > > >> "highlight":{ > > >> "time":0.0}, > > >> "stats":{ > > >> "time":0.0}, > > >> "expand":{ > > >> "time":0.0}, > > >> "terms":{ > > >> "time":0.0}, > > >> "block-expensive-queries":{ > > >> "time":0.0}, > > >> "slow-query-logger":{ > > >> "time":0.0}, > > >> "debug":{ > > >> "time":0.0}}, > > >> "process":{ > > >> "time":16619.0, > > >> "query":{ > > >> "time":16619.0}, > > >> "facet":{ > > >> "time":0.0}, > > >> "facet_module":{ > > >> "time":0.0}, > > >> "mlt":{ > > >> "time":0.0}, > > >> "highlight":{ > > >> "time":0.0}, > > >> "stats":{ > > >> "time":0.0}, > > >> "expand":{ > > >> "time":0.0}, > > >> "terms":{ > > >> "time":0.0}, > > >> "block-expensive-queries":{ > > >> "time":0.0}, > > >> "slow-query-logger":{ > > >> "time":0.0}, > > >> "debug":{ > > >> "time":0.0}}}}} > > >> > > >> > > >> ----snap---- > > >> > > >> can we use query: _root_:abc in the ping request handler ? Tried this > > query > > >> and its returning the results within few miliseconds and also the > nodes > > are > > >> able to recover without any issue. > > >> > > >> we want to use _root_ field for querying as this field is available in > > all > > >> our clusters with below definition: > > >> <field name="_root_" type="string" omitNorms="true" indexed="true" > > >> termOffsets="false" stored="false" termPayloads="false" termPositions= > > >> "false" docValues="false" termVectors="false"/> > > >> Could you please let me know if using _root_ for querying in > > >> pingRequestHandler will cause any problem? > > >> > > >> <requestHandler name="/admin/ping" class="solr.PingRequestHandler"> > <lst > > >> name="invariants"> <str name="qt">/select</str><!-- handler to > delegate > > to > > >> --> <str name="q">_root_:abc</str> </lst> </requestHandler> > > >> > > >> > > >> -- > > >> Best Regards, > > >> Dinesh Naik > > > > > -- Best Regards, Dinesh Naik
