Pyarrow Segfault Regression Test (#7568)

python/ray/tests/BUILD

@@ -407,3 +407,11 @@ py_test(
     tags = ["exclusive"],
     deps = ["//:ray_lib"],
 )
+
+py_test(
+    name = "test_symbol_collisions",
+    size = "small",
+    srcs = ["test_symbol_collisions.py"],
+    tags = ["exclusive"],
+    deps = ["//:ray_lib"],
+)

python/ray/tests/test_symbol_collisions.py

@@ -0,0 +1,29 @@
+"""
+This script ensures that various libraries do not conflict with ray by
+trying to import both libraries in both orders.
+A specific example is that importing ray after pyarrow causes a Segfault.
+"""
+import subprocess
+
+TESTED_LIBRARIES = ["pyarrow"]
+
+
+def test_imports():
+    def try_imports(library1, library2):
+        return_info = subprocess.run([
+            "python", "-c", "import {}; import {}".format(library1, library2)
+        ])
+        if return_info.returncode != 0:
+            return "Importing {} before {} caused an error".format(
+                library1, library2)
+        return ""
+
+    for library in TESTED_LIBRARIES:
+        assert try_imports("ray", library) == ""
+        assert try_imports(library, "ray") == ""
+
+
+if __name__ == "__main__":
+    import sys
+    import pytest
+    sys.exit(pytest.main(["-v", __file__]))