tinder-xli 2e863572f4 Reduce synchronization on field data cache
The field data cache can come under heavy contention in cases when lots
of search threads are hitting it for doc values. This commit reduces the
amount of contention here by using a double-checked locking strategy to
only lock when the cache needs to be initialized.

Relates #27365
2017-11-13 23:35:46 -05:00
..
2017-08-31 09:54:35 -04:00