On 3/19/2019 4:48 PM, Oakley, Craig (NIH/NLM/NCBI) [C] wrote:
I recently noticed that my solr.log files have been getting the following error
message:
o.a.s.h.RequestHandlerBase org.apache.solr.common.SolrException: no field name
specified in query and no default specified via 'df' param
The timing of these messages coincide with pings to leader node of the
SolrCloud from other nodes of the SolrCloud (the message appears only on
whatever node is currently the leader).
I believe that the user for whom I set up this SolrCloud intentionally removed
df from the defaults section of solrconfig.xml (in order to streamline out
parts of the code which he does not use).
I have not (yet) noticed any ill effects from this error. Is this error benign?
Or shall I ask the user to reinstate df in the defaults section of
solrconfig.xml? Or can SorlCloud replication be configured to work around any
ill effects that there may be?
If you don't define df (which means "default field"), then every query
must indicate which field(s) it will query, or you will see that error
message.
It sounds like the query that is in the ping handler needs to be changed
so it includes a field name. Typically ping handlers use *:* for their
query, which is special syntax for all documents, and works even when no
fields are defined. That query is usually extremely fast.
Thanks,
Shawn
