Major An IOException raised during analysis is swallowed by JavabinLoader, so the underlying cause is not visible in the logs, or to the client. Proposed fix is to change
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "ERROR adding document " + document);
to
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "ERROR adding document " + document, e);
on line 99 in JavaBinLoader.java