Elasticsearch add opentrace java instrumentation

The goal of this job is to use OpenTracing to monitor the performance of critical Elasticsearch components (identify bottlenecks) and send the resulting measures to logsense.com. You will use the [login to view URL] open trace java agent combined with your custom opentrace instrumentation for each of the critical Elasticsearch components. You will provide the resulting code to compile Elasticsearch, a VM or Docker with the code running, and a script to push Elasticsearch to its breaking point. Logsense java tracing module: [login to view URL] Opentrace for Java: [login to view URL] Please provide a list of the components you consider to be critical to Elasticsearch. For example, which of the following components of the elasticsearch/server/src/main/java/org/elasticsearch/ module would you configure for instrumentation and why would you choose them? *action Allow pending tasks before state recovery (#44685) *bootstrap Drop dead code for socket permissions for transport (#42990) *cli Add tool elasticsearch-node unsafe-bootstrap (#37696) *client Rename Action to ActionType (#43778) *cluster Remove [login to view URL](ClusterState, String, boolean) (#44629) *common Document Type of Collections Returned by StreamInput (#44686) *discovery Wait for blackholed connection before discovery (#44077) *env Prevent merging nodes' data paths (#42665) *gateway Convert Transport Request/Response to Writeable (#44636) *http Convert several direct uses of Streamable to Writeable (#44586) *index Fix stats in slow logs to be a escaped JSON (#44642) *indices Convert Transport Request/Response to Writeable (#44636) *ingest Improve how internal representation of pipelines are updated (#42257) *monitor Return 0 for negative "free" and "total" memory reported by the OS (#… *node Remove remaining [login to view URL] calls from gateway code (#44095 *persistent Convert remaining Action Response/Request to [login to view URL] (#44528) *plugins Rename Action to ActionType (#43778) *repositories Convert Transport Request/Response to Writeable (#44636) *rest Do not allow version in Rest Update API (#43516) *script update docs referencing allowed script types (#44143) *search Copy field names in stored fields context *snapshots Convert several direct uses of Streamable to Writeable (#44586) *tasks Removal Streamable (#44647) *threadpool scheduleAtFixedRate would hang (#42993) *transport Remove Liveness action (#44666) *usage Core: Less settings to AbstractComponent (#35140) *watcher Remove the use of AbstracLifecycleComponent constructor #37488 (#37488)