[SOLR-8808] SolrJ deleteById causes missing content stream exception

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 5.5
• Fix Version/s: 7.6, 8.0
• Component/s: SolrJ
• Assignee: Unassigned
• Reporter: Markus Jelsma
• Created: 09/Mar/16 13:27
• Updated: 14/Mar/19 13:07
• Resolved: 14/Oct/18 02:27

Description

client.deleteById(new ArrayList<String>()); 

Causes

org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error from server at http://127.0.0.1:50083/collection1: Error from server at http://127.0.0.1:50083/control_collection: missing content stream
        at __randomizedtesting.SeedInfo.seed([6C4973F1A077B797:65D362791DA8A1AD]:0)
        at org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:576)
        at org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:240)
        at org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:229)
        at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:149)
        at org.apache.solr.client.solrj.SolrClient.commit(SolrClient.java:482)
        at org.apache.solr.client.solrj.SolrClient.commit(SolrClient.java:463)

Although this is not a big issue, it had me puzzled for a while. A test unrelated to one i was working on started sending empty deletes. Causing above trace.

Perhaps SolrJ should guard for empty input, just ignore and return.