I'm seeing few failed jobs in CirrusSearch.log :
2015-10-25 22:50:16 mw1006 hiwiki CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-25 22:50:16 mw1014 hiwiki CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-25 23:13:48 mw1013 frwikiversity CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-25 23:13:48 mw1013 frwikiversity CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-25 23:13:48 mw1006 frwikiversity CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-26 00:59:42 mw1005 frwikiversity CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-26 00:59:42 mw1007 frwikiversity CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-26 00:59:42 mw1007 frwikiversity CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-26 04:29:59 mw1012 frwikibooks CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["content",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}There's 55 failures for 20151026 (Sun) and 552 for 20151024 (Fri).
It's not clear to me why we receive jobs with cluster 0, maybe a type conversion from null to 0?
It looks like there always a failure related to Param host does not exist before:
2015-10-26 09:16:23 mw1012 hiwiki CirrusSearch WARNING: Search backend error during counting links to 1 pages after 5: Param host does not exist {"pageCount":1,"took":5,"message":"Param host does not exist"}
2015-10-26 09:16:23 mw1012 hiwiki CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-26 09:17:22 mw1014 hiwiki CirrusSearch WARNING: Search backend error during counting links to 1 pages after 5: Param host does not exist {"pageCount":1,"took":5,"message":"Param host does not exist"}
2015-10-26 09:17:22 mw1014 hiwiki CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-26 10:01:49 mw1006 hiwiki CirrusSearch WARNING: Search backend error during counting links to 1 pages after 6: Param host does not exist {"pageCount":1,"took":6,"message":"Param host does not exist"}
2015-10-26 10:01:49 mw1006 hiwiki CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-26 10:12:20 mw1009 hiwiki CirrusSearch WARNING: Search backend error during counting links to 1 pages after 6: Param host does not exist {"pageCount":1,"took":6,"message":"Param host does not exist"}
2015-10-26 10:12:20 mw1009 hiwiki CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}
2015-10-26 10:14:13 mw1002 hiwiki CirrusSearch WARNING: Search backend error during counting links to 1 pages after 5: Param host does not exist {"pageCount":1,"took":5,"message":"Param host does not exist"}
2015-10-26 10:14:13 mw1002 hiwiki CirrusSearch WARNING: Received job sendData for unwritable cluster 0 0s after insertion {"method":"sendData","arguments":["general",["[object] (Elastica\\Script: {})"],null],"diff":0,"cluster":0}This Param host does not exist error seems to be thrown by Elastica (Elastica/vendor/ruflin/elastica/lib/Elastica/Param.php:140) and likely called by ElasticaConnection.php:121