Error when indexing attachments and when uploading a file (via node edit form) [#2231755]

None of the files are being indexed on my site, which is hosted in the Acquia Cloud. I'm getting this error:

Apache Solr|XXX.153.164.XXX|http://devsite.devcloud.acquia-sites.com/batch?id=1221&op=do|http://devsite.devcloud.acquia-sites.com/batch?op=start&id=1221|0||HTTP Status: 403; Message: Forbidden: Forbidden; Response: Apache Tomcat/6.0.24 - Error report HTTP Status 403 - Access deniedtype Status reportmessage Access denieddescription Access to the specified resource (Access denied) has been forbidden.Apache Tomcat/6.0.24; Request: POST /solr/XXXX-XXXXX.dev.default/extract/tika?resource.name=Friedberg%20CV%20%281-14%29.doc&extractFormat=text&wt=json&request_id=530e1a2127eb6 HTTP/1.0

Apache Solr Attachments|XXX.153.164.XXX|http://devsite.devcloud.acquia-sites.com/batch?id=1221&op=do|http://devsite.devcloud.acquia-sites.com/batch?op=start&id=1221|0||Exception occurred sending /vol/ebs1/gfs/devsite/sites/default/files/person/cvfiles/Friedberg CV (1-14).doc to Solr

I'm also getting the following errors when I open a node's "edit" form, delete a file within it, then re-add the file:

Apache Solr|XXX.153.164.XXX|http://devsite.devcloud.acquia-sites.com/file/ajax/field_person_cv_url/und/0/form-7hvgPAhNACMZ6aG_sms0ycSxQkHmU8PjqmLZOmJ0TY4|http://devsite.devcloud.acquia-sites.com/node/12992/edit|1||HTTP Status: 0; Message: Request failed: Connection refused; Response: ; Request: Unknown; Caller: call_user_func_array() (line Unknown of Unknown)

Originally I thought there was a permissions issue (403 during indexing), but then when uploading a file I'm getting the call_user_func_array() error, so that threw me off. Anyone have any ideas?

UPDATE: If I disable the apachesolr_attachments module the errors on upload go away. If I then re-enable the module they come back right away.