I think since the latest deployment, we have an increasing number of this exception (600/hour):
```
{
"_index": "logstash-2015.08.04",
"_type": "mediawiki",
"_id": "AU752OI2f2hURINuxq6I",
"_score": null,
"_source": {
"message": "Call to a member function getNamespace() on a non-object (NULL)",
"@version": 1,
"@timestamp": "2015-08-04T17:53:37.182Z",
"type": "mediawiki",
"host": "mw1008",
"level": "ERROR",
"tags": [
"syslog",
"es",
"es",
"exception-json",
"normalized_message_untrimmed"
],
"channel": "exception",
"url": "/rpc/RunJobs.php?wiki=eswiki&type=cirrusSearchLinksUpdatePrioritized&maxtime=30&maxmem=300M",
"ip": "127.0.0.1",
"http_method": "POST",
"server": "127.0.0.1",
"referrer": null,
"uid": "53b5de8",
"process_id": 14712,
"wiki": "eswiki",
"private": true,
"file": "/srv/mediawiki/php-1.26wmf16/includes/jobqueue/Job.php",
"line": 199,
"code": 0,
"backtrace": [
{
"file": "/srv/mediawiki/php-1.26wmf16/includes/jobqueue/JobQueueFederated.php",
"line": 221,
"function": "getDeduplicationInfo",
"class": "Job",
"type": "->",
"args": []
},
{
"file": "/srv/mediawiki/php-1.26wmf16/includes/jobqueue/JobQueueFederated.php",
"line": 196,
"function": "tryJobInsertions",
"class": "JobQueueFederated",
"type": "->",
"args": [
"array",
"HashRing",
"integer"
]
},
{
"file": "/srv/mediawiki/php-1.26wmf16/includes/jobqueue/JobQueue.php",
"line": 324,
"function": "doBatchPush",
"class": "JobQueueFederated",
"type": "->",
"args": [
"array",
"integer"
]
},
{
"file": "/srv/mediawiki/php-1.26wmf16/includes/jobqueue/JobQueue.php",
"line": 296,
"function": "batchPush",
"class": "JobQueue",
"type": "->",
"args": [
"array",
"integer"
]
},
{
"file": "/srv/mediawiki/php-1.26wmf16/includes/jobqueue/JobQueueGroup.php",
"line": 129,
"function": "push",
"class": "JobQueue",
"type": "->",
"args": [
"array"
]
},
{
"file": "/srv/mediawiki/php-1.26wmf16/extensions/CirrusSearch/includes/Job/ElasticaWrite.php",
"line": 64,
"function": "push",
"class": "JobQueueGroup",
"type": "->",
"args": [
"array"
]
},
{
"file": "/srv/mediawiki/php-1.26wmf16/extensions/CirrusSearch/includes/Job/Job.php",
"line": 57,
"function": "doJob",
"class": "CirrusSearch\\Job\\ElasticaWrite",
"type": "->",
"args": []
},
{
"file": "/srv/mediawiki/php-1.26wmf16/extensions/CirrusSearch/includes/Updater.php",
"line": 243,
"function": "run",
"class": "CirrusSearch\\Job\\Job",
"type": "->",
"args": []
},
{
"file": "/srv/mediawiki/php-1.26wmf16/extensions/CirrusSearch/includes/Updater.php",
"line": 83,
"function": "deletePages",
"class": "CirrusSearch\\Updater",
"type": "->",
"args": [
"array",
"array",
"integer"
]
},
{
"file": "/srv/mediawiki/php-1.26wmf16/extensions/CirrusSearch/includes/Job/LinksUpdate.php",
"line": 49,
"function": "updateFromTitle",
"class": "CirrusSearch\\Updater",
"type": "->",
"args": [
"Title"
]
},
{
"file": "/srv/mediawiki/php-1.26wmf16/extensions/CirrusSearch/includes/Job/Job.php",
"line": 57,
"function": "doJob",
"class": "CirrusSearch\\Job\\LinksUpdate",
"type": "->",
"args": []
},
{
"file": "/srv/mediawiki/php-1.26wmf16/includes/jobqueue/JobRunner.php",
"line": 183,
"function": "run",
"class": "CirrusSearch\\Job\\Job",
"type": "->",
"args": []
},
{
"file": "/srv/mediawiki/rpc/RunJobs.php",
"line": 42,
"function": "run",
"class": "JobRunner",
"type": "->",
"args": [
"array"
]
}
],
"exception_id": "f142f4be",
"class": "mediawiki",
"message_checksum": "8a717dd6209a3239ad5a8efe906a7e11",
"normalized_message": "Call to a member function getNamespace() on a non-object (NULL)"
},
"sort": [
1438710817182
]
}
```
This is on all wikis but only on jobs requests related to CirrusSearch.