solr collections disappearing

Yesterday I created 7 solr collections. I loaded them up with data and started testing the multi-collection search against them using a webservice to access the search. I tested the searching from my local machine and was happy. This will finally resolve an issue we have had for 8 million years!!! This morning I came in and tested it again, still good. So I pushed the update to a semi-live state and allowed some traffic to it. Almost immediately I started getting "Cannot perform web service invocation search." errors. When I went to the CF administrator to see what was going on, none of the collections were listed. All the physical files still existed, but the collections were not longer registered. I restarted the Solr Service and they all came back. Again, I pushed a little traffic and they disappeared immediately.

There are no entries in the error logs for the server doing the search nor for the server trying to serve the search.

The server is running CF9.0 enterprise, 64-bit with 7GB of ram to the jvm.The largest collection is 554,000 documents.

Has anyone seen this behavior before?

Thanks,

Scott