This I would consider a bug. Probably the easiest approach to stream data from the /export handler with Solrj is to use a SolrStream to send a Streaming Expression that reads from the export handler. This blog describes the approach:
https://lucidworks.com/post/streaming-expressions-in-solrj/ Joel Bernstein http://joelsolr.blogspot.com/ On Wed, Feb 2, 2022 at 1:09 PM Ufuk YILMAZ <uyil...@vivaldi.net.invalid> wrote: > Solr version is 8.4 > > I'm trying to use the export handler through SolrJ: > > CloudSolrClient cloudSolrClient = ... > SolrQuery q = new SolrQuery(); > q.setParam("q", "ts:[1612368422911 TO 1612370422911]"); > q.setParam("sort", "ts asc"); > q.setParam("fl", "ts"); > q.setRequestHandler("/export"); > > cloudSolrClient.queryAndStreamResponse(TWITTER_TWEETS_ALL_TIME, q, new > StreamingResponseCallback() { > > ... > > results in exception: > > Caused by: java.lang.ClassCastException: java.util.LinkedHashMap cannot > be cast to org.apache.solr.common.util.NamedList > at > org.apache.solr.client.solrj.impl.StreamingBinaryResponseParser.streamDocs(StreamingBinaryResponseParser.java:170) > > ~[solr-solrj-8.4.0.jar:8.4.0 bc02ab906445fcf4e297f4ef00ab4a54fdd72ca2 - > jpountz - 2019-12-19 20:19:50] > at > org.apache.solr.client.solrj.impl.StreamingBinaryResponseParser.processResponse(StreamingBinaryResponseParser.java:62) > > ~[solr-solrj-8.4.0.jar:8.4.0 bc02ab906445fcf4e297f4ef00ab4a54fdd72ca2 - > jpountz - 2019-12-19 20:19:50] > at > org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:636) > > ~[solr-solrj-8.4.0.jar:8.4.0 bc02ab906445fcf4e297f4ef00ab4a54fdd72ca2 - > jpountz - 2019-12-19 20:19:50] > > am I doing something wrong or is this a bug? >
