fix: enabling gzip was causing eof errors upon decompression

Author: leorinat

exporter/awskinesisexporter/internal/compress/compresser.go

@@ -16,6 +16,7 @@ type bufferedResetWriter interface {
 	Write(p []byte) (int, error)
 	Flush() error
 	Reset(newWriter io.Writer)
+	Close() error
 }
 
 type Compressor interface {
@@ -74,5 +75,11 @@ func (c *compressor) Do(in []byte) ([]byte, error) {
 		return nil, err
 	}
 
+	if closer, ok := c.compression.(io.Closer); ok {
+		if err := closer.Close(); err != nil {
+			return nil, err
+		}
+	}
+
 	return buf.Bytes(), nil
 }

exporter/awskinesisexporter/internal/compress/noop_compression.go

@@ -26,3 +26,5 @@ func (n noop) Write(p []byte) (int, error) {
 func (n noop) Flush() error {
 	return nil
 }
+
+func (n *noop) Close() error { return n.Close() }