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https://issues.apache.org/jira/browse/THRIFT-4424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16389957#comment-16389957
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Philip Frank commented on THRIFT-4424:
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I think this is a duplicate of THRIFT-4437 with a fix coming in 0.12
> Flush in TWebSocketTransport pushes callbacks twice if transport is open
> ------------------------------------------------------------------------
>
> Key: THRIFT-4424
> URL: https://issues.apache.org/jira/browse/THRIFT-4424
> Project: Thrift
> Issue Type: Bug
> Components: JavaScript - Library
> Affects Versions: 0.11.0
> Reporter: Markus Hocke
> Priority: Major
>
> The flush code looks like this (see also comments in this snippet):
> {code:javascript}
> flush: function(async, callback) {
> var self = this;
> if (this.isOpen()) {
> //Send data and register a callback to invoke the client callback
> this.socket.send(this.send_buf);
> this.callbacks.push((function() {
> var clientCallback = callback;
> return function(msg) {
> self.setRecvBuffer(msg);
> clientCallback();
> };
> }()));
> // Here the callback gets pushed a second time.
> if(callback) { // What is the intention of this code section?
> this.callbacks.push((function() {
> var clientCallback = callback;
> return function(msg) {
> self.setRecvBuffer(msg);
> clientCallback();
> };
> }()));
> }
> } else {
> //Queue the send to go out __onOpen
> this.send_pending.push({
> buf: this.send_buf,
> cb: callback
> });
> }
> }
> {code}
> We're having trouble with callbacks called twice in our web client
> implementation that assumes that the callback is only called once. This
> should be a default behaviour in my opinion. I'd suggest to remove this
> if-clause.
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