pagespeed 111 error

2016/03/12 09:58:45 [error] 72391#0: [ngx_pagespeed 1.9.32.10-7423] Serf status 111(Connection refused) polling for 1 threaded fetches for 0.05 seconds

2016/03/12 09:58:45 [error] 72391#0: [ngx_pagespeed 1.9.32.10-7423] Serf status 111(Connection refused) polling for 1 threaded fetches for 0.05 seconds

2016/03/12 09:58:46 [error] 72391#0: [ngx_pagespeed 1.9.32.10-7423] Serf status 111(Connection refused) polling for 1 threaded fetches for 0.05 seconds

2016/03/12 09:58:46 [error] 72391#0: [ngx_pagespeed 1.9.32.10-7423] Serf status 111(Connection refused) polling for 1 threaded fetches for 0.05 seconds

2016/03/12 09:58:48 [error] 72391#0: [ngx_pagespeed 1.9.32.10-7423] Serf status 111(Connection refused) polling for 1 threaded fetches for 0.05 seconds

2016/03/12 09:58:48 [error] 72391#0: [ngx_pagespeed 1.9.32.10-7423] Serf status 111(Connection refused) polling for 1 threaded fetches for 0.05 seconds

2016/03/12 09:58:50 [error] 72391#0: [ngx_pagespeed 1.9.32.10-7423] Serf status 111(Connection refused) polling for 1 threaded fetches for 0.05 seconds

2016/03/12 09:58:50 [error] 72391#0: [ngx_pagespeed 1.9.32.10-7423] Serf status 111(Connection refused) polling for 1 threaded fetches for 0.05 seconds

nginx 1.6.2

debian 8

nginx+php5-fpm

pagespeed On;

pagespeed FileCachePath /var/cache/ngx_pagespeed;

pagespeed FileCacheSizeKb 102400;

pagespeed FileCacheCleanIntervalMs 3600000;

pagespeed FileCacheInodeLimit 500000;

pagespeed MapOriginDomain origin_to_fetch_from origin_specified_in_html [host_header];

pagespeed EnableFilters combine_css,combine_javascript,inline_javascript,inline_css;

pagespeed EnableFilters remove_quotes,remove_comments;

pagespeed EnableFilters rewrite_javascript,rewrite_css,rewrite_images;

pagespeed EnableFilters collapse_whitespace,extend_cache,insert_img_dimensions;

pagespeed EnableFilters recompress_images;

pagespeed MemcachedServers "localhost:11211";

Встречался ли кто с этим? И исправлял?