Hi,
The CloudSolrStream client (Solr 6.3.0) assumes that the sort param always
have the order.
starting in line 326:
String[] sorts = sort.split(",");
StreamComparator[] comps = new StreamComparator[sorts.length];
for(int i=0; i<sorts.length; i++) {
String s = sorts[i];
String[] spec = s.trim().split("\\s+"); //This should take into
account spaces in the sort spec.
String fieldName = spec[0].trim();
String order = spec[1].trim();
....
This code doesn't check that the spec param can be inserted incorrectly like
"id" and not like "id asc|desc" and as a result the spec has only one index.
The CloudSolrStream client returns null without any kind of message warning
the user that the order is mandatory.
-----
Best regards
/Yago
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