I am using BulkProcessor to index data. I am using a 8core machine.
BulkProcessor.builder(highLevelClient::bulkAsync, listener).setBulkActions(3000) .setBulkSize(new ByteSizeValue(50, ByteSizeUnit.MB)) .setConcurrentRequests(8) .setFlushInterval(TimeValue.timeValueMillis(5000)) .build();
When i was on 6.3.0 i could see that the total number of I/O Dispatcher threads spawned were 8, and all of them were being used.
After migrating to 6.3.1 i have suddenly started seeing 16 threads for I/O Dispatcher, and 8 of them are being used and other 8 are idle.
I had noted this behaviour when i was on 6.1.3 and had set connectionRequestTimeout manually to -1 as suggested in #107216
Is this related to the connectionRequestTimeout(-1) fix in 6.3.1 ?? #30384