Around 3000 warnings per hour since 2018-05-09T19:31:36. I don't know if this is a really bad breakage or it is just an informative text, I am going to assume the latter based on the level used. Probably some debugging introduced on the latest release?
```
{
"_index": "logstash-2018.05.09",
"_type": "mediawiki",
"_id": "AWNGYzcQIqXYUKtvgxO6",
"_version": 1,
"_score": null,
"_source": {
"server": "www.mediawiki.org",
"unique_id": "WvNMkwpAIDEAALd35wsAAAAN",
"level": "WARNING",
"ip": "10.64.0.105",
"wiki": "mediawikiwiki",
"channel": "DBReplication",
"mwversion": "1.32.0-wmf.3",
"message": "Wikimedia\\Rdbms\\ChronologyProtector::initPositions: expected but failed to find position index.",
"type": "mediawiki",
"normalized_message": "Wikimedia\\Rdbms\\ChronologyProtector::initPositions: expected but failed to find position index.",
"url": "/wiki/Special:CentralAutoLogin/createSession?token=<token>&type=1x1&from=enwiki&proto=https&cpPosIndex=7",
"tags": [
"syslog",
"es",
"es"
],
"reqId": "WvNMkwpAIDEAALd35wsAAAAN",
"referrer": "https://en.wikipedia.org/",
"@timestamp": "2018-05-09T19:31:36.000Z",
"http_method": "GET",
"cpPosIndex": 7,
"@version": 1,
"host": "mw1328",
"waitTimeMs": 5000.3664493561,
"shard": "s3",
"indexReached": null
},
"fields": {
"@timestamp": [
1525894296000
]
},
"sort": [
1525894296000
]
}
```
The errors seem constant, so it doesn't look like a one-time lagging issue. Only added Releng in case it is a train blocker, remove them otherwise.