grpc-js: Add channel construction stacktrace traces

murgatroid99 · murgatroid99 · commit 97584dcf3193 · 2022-03-16T11:27:05.000-07:00
diff --git a/doc/environment_variables.md b/doc/environment_variables.md
@@ -39,6 +39,7 @@ can be set.
   - `subchannel_refcount` - Traces subchannel refcount changes. Includes per-call logs.
   - `subchannel_flowctrl` - Traces HTTP/2 flow control. Includes per-call logs.
   - `subchannel_internals` - Traces HTTP/2 session state. Includes per-call logs.
+  - `channel_stacktrace` - Traces channel construction events with stack traces.
 
   The following tracers are added by the `@grpc/grpc-js-xds` library:
   - `cds_balancer` - Traces the CDS load balancing policy
diff --git a/packages/grpc-js/src/channel.ts b/packages/grpc-js/src/channel.ts
@@ -335,6 +335,8 @@ export class ChannelImplementation implements Channel {
       new CompressionFilterFactory(this, this.options),
     ]);
     this.trace('Channel constructed with options ' + JSON.stringify(options, undefined, 2));
+    const error = new Error();
+    trace(LogVerbosity.DEBUG, 'channel_stacktrace', '(' + this.channelzRef.id + ') ' + 'Channel constructed \n' + error.stack?.substring(error.stack.indexOf('\n')+1));
   }
 
   private getChannelzInfo(): ChannelInfo {

Original file line number	Diff line number	Diff line change
`@@ -335,6 +335,8 @@ export class ChannelImplementation implements Channel {`
`335`	`335`	`new CompressionFilterFactory(this, this.options),`
`336`	`336`	`]);`
`337`	`337`	`this.trace('Channel constructed with options ' + JSON.stringify(options, undefined, 2));`
	`338`	`+ const error = new Error();`
	`339`	`+ trace(LogVerbosity.DEBUG, 'channel_stacktrace', '(' + this.channelzRef.id + ') ' + 'Channel constructed \n' + error.stack?.substring(error.stack.indexOf('\n')+1));`
`338`	`340`	`}`
`339`	`341`
`340`	`342`	`private getChannelzInfo(): ChannelInfo {`