Fail if key is empty.

open-telemetry · Aug 27, 2019 · 7239e4f · 7239e4f
1 parent 938a0b3
commit 7239e4f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/opentelemetry-api/src/opentelemetry/distributedcontext/__init__.py b/opentelemetry-api/src/opentelemetry/distributedcontext/__init__.py
@@ -49,7 +49,7 @@ def __new__(cls, value: str) -> "EntryKey":
 
     @staticmethod
     def create(value: str) -> "EntryKey":
-        if len(value) > 255 or any(c not in PRINTABLE for c in value):
+        if not 0 < len(value) <= 255 or any(c not in PRINTABLE for c in value):
             raise ValueError("Invalid EntryKey", value)
 
         return typing.cast(EntryKey, value)