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From Zheng Lin Edwin Yeo <edwinye...@gmail.com>
Subject Re: Joining more than 2 collections
Date Thu, 04 May 2017 01:56:57 GMT
Hi Joel,

It works when I started off with just one expression.

Could it be that the data size is too big for export after the join, which
causes the error?

Regards,
Edwin

On 4 May 2017 at 02:53, Joel Bernstein <joelsolr@gmail.com> wrote:

> I was just testing with the query below and it worked for me. Some of the
> error messages I was getting with the syntax was not what I was expecting
> though, so I'll look into the error handling. But the joins do work when
> the syntax correct. The query below is joining to the same collection three
> times, but the mechanics are exactly the same joining three different
> tables. In this example each join narrows down the result set.
>
> hashJoin(parallel(collection2,
>                             workers=3,
>                             sort="id asc",
>                             innerJoin(search(collection2, q="*:*", fl="id",
> sort="id asc", qt="/export", partitionKeys="id"),
>                                             search(collection2,
> q="year_i:42", fl="id, year_i", sort="id asc", qt="/export",
> partitionKeys="id"),
>                                             on="id")),
>                 hashed=search(collection2, q="day_i:7", fl="id, day_i",
> sort="id asc", qt="/export"),
>                 on="id")
>
> Joel Bernstein
> http://joelsolr.blogspot.com/
>
> On Wed, May 3, 2017 at 1:29 PM, Joel Bernstein <joelsolr@gmail.com> wrote:
>
> > Start off with just this expression:
> >
> > search(collection2,
> >             q=*:*,
> >             fl="a_s,b_s,c_s,d_s,e_s",
> >             sort="a_s asc",
> >             qt="/export")
> >
> > And then check the logs for exceptions.
> >
> > Joel Bernstein
> > http://joelsolr.blogspot.com/
> >
> > On Wed, May 3, 2017 at 12:35 PM, Zheng Lin Edwin Yeo <
> edwinyeozl@gmail.com
> > > wrote:
> >
> >> Hi Joel,
> >>
> >> I am getting this error after I change add qt=/export and removed the
> rows
> >> param. Do you know what could be the reason?
> >>
> >> {
> >>   "error":{
> >>     "metadata":[
> >>       "error-class","org.apache.solr.common.SolrException",
> >>       "root-error-class","org.apache.http.MalformedChunkCodingExce
> >> ption"],
> >>     "msg":"org.apache.http.MalformedChunkCodingException: CRLF expected
> >> at
> >> end of chunk",
> >>     "trace":"org.apache.solr.common.SolrException:
> >> org.apache.http.MalformedChunkCodingException: CRLF expected at end of
> >> chunk\r\n\tat
> >> org.apache.solr.client.solrj.io.stream.TupleStream.lambda$wr
> >> iteMap$0(TupleStream.java:79)\r\n\tat
> >> org.apache.solr.response.JSONWriter.writeIterator(JSONRespon
> >> seWriter.java:523)\r\n\tat
> >> org.apache.solr.response.TextResponseWriter.writeVal(TextRes
> >> ponseWriter.java:175)\r\n\tat
> >> org.apache.solr.response.JSONWriter$2.put(JSONResponseWriter
> >> .java:559)\r\n\tat
> >> org.apache.solr.client.solrj.io.stream.TupleStream.writeMap(
> >> TupleStream.java:64)\r\n\tat
> >> org.apache.solr.response.JSONWriter.writeMap(JSONResponseWri
> >> ter.java:547)\r\n\tat
> >> org.apache.solr.response.TextResponseWriter.writeVal(TextRes
> >> ponseWriter.java:193)\r\n\tat
> >> org.apache.solr.response.JSONWriter.writeNamedListAsMapWithD
> >> ups(JSONResponseWriter.java:209)\r\n\tat
> >> org.apache.solr.response.JSONWriter.writeNamedList(JSONRespo
> >> nseWriter.java:325)\r\n\tat
> >> org.apache.solr.response.JSONWriter.writeResponse(JSONRespon
> >> seWriter.java:120)\r\n\tat
> >> org.apache.solr.response.JSONResponseWriter.write(JSONRespon
> >> seWriter.java:71)\r\n\tat
> >> org.apache.solr.response.QueryResponseWriterUtil.writeQueryR
> >> esponse(QueryResponseWriterUtil.java:65)\r\n\tat
> >> org.apache.solr.servlet.HttpSolrCall.writeResponse(HttpSolrC
> >> all.java:732)\r\n\tat
> >> org.apache.solr.servlet.HttpSolrCall.call(
> HttpSolrCall.java:473)\r\n\tat
> >> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDisp
> >> atchFilter.java:345)\r\n\tat
> >> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDisp
> >> atchFilter.java:296)\r\n\tat
> >> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilte
> >> r(ServletHandler.java:1691)\r\n\tat
> >> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHan
> >> dler.java:582)\r\n\tat
> >> org.eclipse.jetty.server.handler.ScopedHandler.handle(Scoped
> >> Handler.java:143)\r\n\tat
> >> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHa
> >> ndler.java:548)\r\n\tat
> >> org.eclipse.jetty.server.session.SessionHandler.doHandle(
> >> SessionHandler.java:226)\r\n\tat
> >> org.eclipse.jetty.server.handler.ContextHandler.doHandle(
> >> ContextHandler.java:1180)\r\n\tat
> >> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHand
> >> ler.java:512)\r\n\tat
> >> org.eclipse.jetty.server.session.SessionHandler.doScope(
> >> SessionHandler.java:185)\r\n\tat
> >> org.eclipse.jetty.server.handler.ContextHandler.doScope(
> >> ContextHandler.java:1112)\r\n\tat
> >> org.eclipse.jetty.server.handler.ScopedHandler.handle(Scoped
> >> Handler.java:141)\r\n\tat
> >> org.eclipse.jetty.server.handler.ContextHandlerCollection.ha
> >> ndle(ContextHandlerCollection.java:213)\r\n\tat
> >> org.eclipse.jetty.server.handler.HandlerCollection.handle(
> >> HandlerCollection.java:119)\r\n\tat
> >> org.eclipse.jetty.server.handler.HandlerWrapper.handle(Handl
> >> erWrapper.java:134)\r\n\tat
> >> org.eclipse.jetty.server.Server.handle(Server.java:534)\r\n\tat
> >> org.eclipse.jetty.server.HttpChannel.handle(
> HttpChannel.java:320)\r\n\tat
> >> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConne
> >> ction.java:251)\r\n\tat
> >> org.eclipse.jetty.io.AbstractConnection$ReadCallback.
> >> succeeded(AbstractConnection.java:273)\r\n\tat
> >> org.eclipse.jetty.io.FillInterest.fillable(
> FillInterest.java:95)\r\n\tat
> >> org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChann
> >> elEndPoint.java:93)\r\n\tat
> >> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume
> >> .executeProduceConsume(ExecuteProduceConsume.java:303)\r\n\tat
> >> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume
> >> .produceConsume(ExecuteProduceConsume.java:148)\r\n\tat
> >> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume
> >> .run(ExecuteProduceConsume.java:136)\r\n\tat
> >> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(Queued
> >> ThreadPool.java:671)\r\n\tat
> >> org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedT
> >> hreadPool.java:589)\r\n\tat
> >> java.lang.Thread.run(Thread.java:745)\r\nCaused by:
> >> org.apache.http.MalformedChunkCodingException: CRLF expected at end of
> >> chunk\r\n\tat
> >> org.apache.http.impl.io.ChunkedInputStream.getChunkSize(Chun
> >> kedInputStream.java:255)\r\n\tat
> >> org.apache.http.impl.io.ChunkedInputStream.nextChunk(Chunked
> >> InputStream.java:227)\r\n\tat
> >> org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInput
> >> Stream.java:186)\r\n\tat
> >> org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInput
> >> Stream.java:215)\r\n\tat
> >> org.apache.http.impl.io.ChunkedInputStream.close(ChunkedInpu
> >> tStream.java:316)\r\n\tat
> >> org.apache.http.conn.BasicManagedEntity.streamClosed(BasicMa
> >> nagedEntity.java:164)\r\n\tat
> >> org.apache.http.conn.EofSensorInputStream.checkClose(EofSens
> >> orInputStream.java:228)\r\n\tat
> >> org.apache.http.conn.EofSensorInputStream.close(EofSensorInp
> >> utStream.java:174)\r\n\tat
> >> sun.nio.cs.StreamDecoder.implClose(StreamDecoder.java:378)\r\n\tat
> >> sun.nio.cs.StreamDecoder.close(StreamDecoder.java:193)\r\n\tat
> >> java.io.InputStreamReader.close(InputStreamReader.java:199)\r\n\tat
> >> org.apache.solr.client.solrj.io.stream.JSONTupleStream.close
> >> (JSONTupleStream.java:92)\r\n\tat
> >> org.apache.solr.client.solrj.io.stream.SolrStream.close(Solr
> >> Stream.java:193)\r\n\tat
> >> org.apache.solr.client.solrj.io.stream.CloudSolrStream.close
> >> (CloudSolrStream.java:464)\r\n\tat
> >> org.apache.solr.client.solrj.io.stream.HashJoinStream.close(
> >> HashJoinStream.java:231)\r\n\tat
> >> org.apache.solr.client.solrj.io.stream.ExceptionStream.close
> >> (ExceptionStream.java:93)\r\n\tat
> >> org.apache.solr.handler.StreamHandler$TimerStream.close(
> >> StreamHandler.java:452)\r\n\tat
> >> org.apache.solr.client.solrj.io.stream.TupleStream.lambda$wr
> >> iteMap$0(TupleStream.java:71)\r\n\t...
> >> 40 more\r\n",
> >>     "code":500}}
> >>
> >>
> >> Regards,
> >> Edwin
> >>
> >>
> >> On 4 May 2017 at 00:00, Joel Bernstein <joelsolr@gmail.com> wrote:
> >>
> >> > I've reformatted the expression below and made a few changes. You have
> >> put
> >> > things together properly. But these are MapReduce joins that require
> >> > exporting the entire result sets. So you will need to add qt=/export
> to
> >> all
> >> > the searches and remove the rows param. In Solr 6.6. there is a new
> >> > "shuffle" expression that does this automatically.
> >> >
> >> > To test things you'll want to break down each expression and make sure
> >> it's
> >> > behaving as expected.
> >> >
> >> > For example first run each search. Then run the innerJoin, not in
> >> parallel
> >> > mode. Then run it in parallel mode. Then try the whole thing.
> >> >
> >> > hashJoin(parallel(collection2,
> >> >                             innerJoin(search(collection2,
> >> >                                                        q=*:*,
> >> >
> >> >  fl="a_s,b_s,c_s,d_s,e_s",
> >> >                                                        sort="a_s asc",
> >> >
> >> partitionKeys="a_s",
> >> >                                                        qt="/export"),
> >> >                                            search(collection1,
> >> >                                                        q=*:*,
> >> >
> >> >  fl="a_s,f_s,g_s,h_s,i_s,j_s",
> >> >                                                        sort="a_s asc",
> >> >
> >>  partitionKeys="a_s",
> >> >                                                       qt="/export"),
> >> >                                            on="a_s"),
> >> >                              workers="2",
> >> >                              sort="a_s asc"),
> >> >                hashed=search(collection3,
> >> >                                          q=*:*,
> >> >                                          fl="a_s,k_s,l_s",
> >> >                                          sort="a_s asc",
> >> >                                          qt="/export"),
> >> >               on="a_s")
> >> >
> >> > Joel Bernstein
> >> > http://joelsolr.blogspot.com/
> >> >
> >> > On Wed, May 3, 2017 at 11:26 AM, Zheng Lin Edwin Yeo <
> >> edwinyeozl@gmail.com
> >> > >
> >> > wrote:
> >> >
> >> > > Hi Joel,
> >> > >
> >> > > Thanks for the clarification.
> >> > >
> >> > > Would like to check, is this the correct way to do the join?
> >> Currently, I
> >> > > could not get any results after putting in the hashJoin for the 3rd,
> >> > > smallerStream collection (collection3).
> >> > >
> >> > > http://localhost:8983/solr/collection1/stream?expr=
> >> > > hashJoin(parallel(collection2
> >> > > ,
> >> > > innerJoin(
> >> > >  search(collection2,
> >> > > q=*:*,
> >> > > fl="a_s,b_s,c_s,d_s,e_s",
> >> > >              sort="a_s asc",
> >> > > partitionKeys="a_s",
> >> > > rows=200),
> >> > >  search(collection1,
> >> > > q=*:*,
> >> > > fl="a_s,f_s,g_s,h_s,i_s,j_s",
> >> > >              sort="a_s asc",
> >> > > partitionKeys="a_s",
> >> > > rows=200),
> >> > >          on="a_s"),
> >> > > workers="2",
> >> > >                  sort="a_s asc"),
> >> > >          hashed=search(collection3,
> >> > > q=*:*,
> >> > > fl="a_s,k_s,l_s",
> >> > > sort="a_s asc",
> >> > > rows=200),
> >> > > on="a_s")
> >> > > &indent=true
> >> > >
> >> > >
> >> > > Regards,
> >> > > Edwin
> >> > >
> >> > >
> >> > > On 3 May 2017 at 20:59, Joel Bernstein <joelsolr@gmail.com>
wrote:
> >> > >
> >> > > > Sorry, it's just called hashJoin
> >> > > >
> >> > > > Joel Bernstein
> >> > > > http://joelsolr.blogspot.com/
> >> > > >
> >> > > > On Wed, May 3, 2017 at 2:45 AM, Zheng Lin Edwin Yeo <
> >> > > edwinyeozl@gmail.com>
> >> > > > wrote:
> >> > > >
> >> > > > > Hi Joel,
> >> > > > >
> >> > > > > I am getting this error when I used the innerHashJoin.
> >> > > > >
> >> > > > >  "EXCEPTION":"Invalid stream expression innerHashJoin(parallel(
> >> > > innerJoin
> >> > > > >
> >> > > > > I also can't find the documentation on innerHashJoin for
the
> >> > Streaming
> >> > > > > Expressions.
> >> > > > >
> >> > > > > Are you referring to hashJoin?
> >> > > > >
> >> > > > > Regards,
> >> > > > > Edwin
> >> > > > >
> >> > > > >
> >> > > > > On 3 May 2017 at 13:20, Zheng Lin Edwin Yeo <
> edwinyeozl@gmail.com
> >> >
> >> > > > wrote:
> >> > > > >
> >> > > > > > Hi Joel,
> >> > > > > >
> >> > > > > > Thanks for the info.
> >> > > > > >
> >> > > > > > Regards,
> >> > > > > > Edwin
> >> > > > > >
> >> > > > > >
> >> > > > > > On 3 May 2017 at 02:04, Joel Bernstein <joelsolr@gmail.com>
> >> wrote:
> >> > > > > >
> >> > > > > >> Also take a look at the documentation for the "fetch"
> streaming
> >> > > > > >> expression.
> >> > > > > >>
> >> > > > > >> Joel Bernstein
> >> > > > > >> http://joelsolr.blogspot.com/
> >> > > > > >>
> >> > > > > >> On Tue, May 2, 2017 at 2:03 PM, Joel Bernstein
<
> >> > joelsolr@gmail.com>
> >> > > > > >> wrote:
> >> > > > > >>
> >> > > > > >> > Yes you join more then one collection with
Streaming
> >> > Expressions.
> >> > > > Here
> >> > > > > >> are
> >> > > > > >> > a few things to keep in mind.
> >> > > > > >> >
> >> > > > > >> > * You'll likely want to use the parallel function
around
> the
> >> > > largest
> >> > > > > >> join.
> >> > > > > >> > You'll need to use the join keys as the partitionKeys.
> >> > > > > >> > * innerJoin: requires that the streams be
sorted on the
> join
> >> > keys.
> >> > > > > >> > * innerHashJoin: has no sorting requirement.
> >> > > > > >> >
> >> > > > > >> > So a strategy for a three collection join
might look like
> >> this:
> >> > > > > >> >
> >> > > > > >> > innerHashJoin(parallel(innerJoin(bigStream,
bigStream)),
> >> > > > > smallerStream)
> >> > > > > >> >
> >> > > > > >> > The largest join can be done in parallel using
an
> innerJoin.
> >> You
> >> > > can
> >> > > > > >> then
> >> > > > > >> > wrap the stream coming out of the parallel
function in an
> >> > > > > innerHashJoin
> >> > > > > >> to
> >> > > > > >> > join it to another stream.
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> > Joel Bernstein
> >> > > > > >> > http://joelsolr.blogspot.com/
> >> > > > > >> >
> >> > > > > >> > On Mon, May 1, 2017 at 9:42 PM, Zheng Lin
Edwin Yeo <
> >> > > > > >> edwinyeozl@gmail.com>
> >> > > > > >> > wrote:
> >> > > > > >> >
> >> > > > > >> >> Hi,
> >> > > > > >> >>
> >> > > > > >> >> Is it possible to join more than 2 collections
using one
> of
> >> the
> >> > > > > >> streaming
> >> > > > > >> >> expressions (Eg: innerJoin)? If not, is
there other ways
> we
> >> can
> >> > > do
> >> > > > > it?
> >> > > > > >> >>
> >> > > > > >> >> Currently, I may need to join 3 or 4 collections
together,
> >> and
> >> > to
> >> > > > > >> output
> >> > > > > >> >> selected fields from all these collections
together.
> >> > > > > >> >>
> >> > > > > >> >> I'm using Solr 6.4.2.
> >> > > > > >> >>
> >> > > > > >> >> Regards,
> >> > > > > >> >> Edwin
> >> > > > > >> >>
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >>
> >> > > > > >
> >> > > > > >
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> >
> >
>

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