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 <[email protected]>
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 <[email protected]> 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 <[email protected]>:
> >>
> >> 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
>
>
