PUT OBJECT COPY with zero-byte source object sometimes hangs

Applies to

StorageGRID 11.4

Issue

• S3 API CopyObject fails with zero-byte source object
• Issuing CopyObject by curl freezes without error pop-ups:

$
...
curl -iksS -X PUT <url>/<destination-bucket>/<zero-byte-object-copy> -H content-length:0 -H x-amz-content-sha256:<content-sha256> -H x-amz-copy-source:/<source-bucket>/<zero-byte-object> -H x-amz-date:<YYYYmmddTHHMMSSZ> -H Authorization:AWS4-HMAC-SHA256 Credential=<credential>,SignedHeaders=<headers>,Signature=<signature>
^C  << command hangs and is aborted manually
$

• Issuing CopyObject by AWS Command Line fails with error Read timeout on endpoint URL:

$ aws s3api --debug --endpoint-url <url> --no-verify-ssl copy-object --bucket <destination-bucket> --key <zero-byte-object-copy> --copy-source /<source-bucket>/<zero-byte-object>
...
Read timeout on endpoint URL:
"<url>/<destination-bucket>/<zero-byte-object-copy>"
$

• CopyObject succeeds with non-zero-byte source object
• Issuing s3 cp command to copy a zero-byte file to a different name gets Read timed out error:

DEBUG - retry needed, retryable exception caught: HTTPSConnectionPool(host='hostname', port=xxx): Read timed out. (read  timeout=xx)