CHANGELOG.md in opentelemetry-sdk-0.8.0 vs CHANGELOG.md in opentelemetry-sdk-0.9.0

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 # Release History: opentelemetry-sdk
 
+### v0.9.0 / 2020-11-27
+
+* BREAKING CHANGE: Pass full Context to samplers 
+* BREAKING CHANGE: Add timeout for force_flush and shutdown 
+
+* ADDED: Add OTEL_RUBY_BSP_START_THREAD_ON_BOOT env var 
+* ADDED: Add timeout for force_flush and shutdown 
+* FIXED: Signal at batch_size 
+* FIXED: SDK Span.recording? after finish 
+* FIXED: Pass full Context to samplers 
+* DOCS: Add documentation on usage scenarios for span processors 
+
 ### v0.8.0 / 2020-10-27
 
 * BREAKING CHANGE: Move context/span methods to Trace module 
 * BREAKING CHANGE: Remove 'canonical' from status codes 
 * BREAKING CHANGE: Assorted SpanContext fixes 