Direct version: Adds 3.19.3

[j82w]

Pull Request Template

Description

Commit dd6e7a19: Merged PR 574945: ClientDiagnostics: Adding TransportRequestStats class for tracking Request Timeline

RntbdRequestStats: adding timeline of events of a particular request

it adds the following Diagnostics to the StoreResult:

        "transportRequestTimeline": [
          {
            "event": "Created",
            "startTime": "2021-01-08T23:46:13.854349700Z",
            "durationInMicroSec": 198128
          },
          {
            "event": "ChannelAcquisitionStarted",
            "startTime": "2021-01-08T23:46:14.053459800Z",
            "durationInMicroSec": 696717
          },
          {
            "event": "Pipelined",
            "startTime": "2021-01-08T23:46:14.750177400Z",
            "durationInMicroSec": 175661
          },
          {
            "event": "TRANSIT TIME",
            "startTime": "2021-01-08T23:46:14.925839100Z",
            "durationInMicroSec": 76338
          },
          {
            "event": "Received",
            "startTime": "2021-01-08T23:46:15.002178Z",
            "durationInMicroSec": 103141
          },
          {
            "event": "Completed",
            "startTime": "2021-01-08T23:46:15.105319600Z",
            "durationInMicroSec": 0
          }
        ]

Commit d90fa571: Merged PR 524605: [SDK] Remove noisy trace in QuorumReader
This trace when combined with DefaultTraceListener being attached to DefaultTrace causes lock contention and high latencies on Quorum Reads.
Customers who explicitly opt out of Default Trace (including legacy GW and Compute) are unaffected but direct customers who just use the default configuration can be.

Move this trace to only log if Quorum is not met instead of every request.

Type of change

Please delete options that are not relevant.

• [] Bug fix (non-breaking change which fixes an issue)
• [] New feature (non-breaking change which adds functionality)
• [] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [] This change requires a documentation update

Closing issues

To automatically close an issue: closes #IssueNumber

[asketagarwal]

Looks good to me.