youngoli commented on a change in pull request #12215:
URL: https://github.com/apache/beam/pull/12215#discussion_r453109313
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File path: sdks/go/pkg/beam/io/synthetic/source.go
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@@ -124,8 +125,8 @@ func (fn *sourceFn) Setup() {
// ProcessElement creates a number of random elements based on the restriction
// tracker received. Each element is a random byte slice key and value, in the
// form of KV<[]byte, []byte>.
-func (fn *sourceFn) ProcessElement(rt *offsetrange.Tracker, config
SourceConfig, emit func([]byte, []byte)) error {
- for i := rt.Rest.Start; rt.TryClaim(i) == true; i++ {
+func (fn *sourceFn) ProcessElement(rt *sdf.LockRTracker, _ SourceConfig, emit
func([]byte, []byte)) error {
+ for i := rt.Rt.(*offsetrange.Tracker).Rest.Start; rt.TryClaim(i) ==
true; i++ {
Review comment:
Hmm, that's a good point. I didn't think about it much because it was
fine before, but yeah this wouldn't work now. A split could theoretically be
happening while that line is being called, and the tracker would be modified.
I'll try adding a getter.
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