hi, i use s3cmd 2.0.2 to operate ceph rgw bucket, when i list a bucket , i got an error S3 error: 403 (SignatureDoesNotMatch)

DEBUG: s3cmd version 2.0.2
DEBUG: ConfigParser: Reading file '/root/.s3cfg'
DEBUG: ConfigParser: access_key->LM...17_chars...R
DEBUG: ConfigParser: access_token->
DEBUG: ConfigParser: add_encoding_exts->
DEBUG: ConfigParser: add_headers->
DEBUG: ConfigParser: bucket_location->US
DEBUG: ConfigParser: ca_certs_file->
DEBUG: ConfigParser: cache_file->
DEBUG: ConfigParser: check_ssl_certificate->True
DEBUG: ConfigParser: check_ssl_hostname->True
DEBUG: ConfigParser: cloudfront_host->cloudfront.amazonaws.com
DEBUG: ConfigParser: content_disposition->
DEBUG: ConfigParser: content_type->
DEBUG: ConfigParser: default_mime_type->binary/octet-stream
DEBUG: ConfigParser: delay_updates->False
DEBUG: ConfigParser: delete_after->False
DEBUG: ConfigParser: delete_after_fetch->False
DEBUG: ConfigParser: delete_removed->False
DEBUG: ConfigParser: dry_run->False
DEBUG: ConfigParser: enable_multipart->True
DEBUG: ConfigParser: encrypt->False
DEBUG: ConfigParser: expiry_date->
DEBUG: ConfigParser: expiry_days->
DEBUG: ConfigParser: expiry_prefix->
DEBUG: ConfigParser: follow_symlinks->False
DEBUG: ConfigParser: force->False
DEBUG: ConfigParser: get_continue->False
DEBUG: ConfigParser: gpg_command->/bin/gpg
DEBUG: ConfigParser: gpg_decrypt->%(gpg_command)s -d --verbose --no-use-agent --batch --yes --passphrase-fd %(passphrase_fd)s -o %(output_file)s %(input_file)s
DEBUG: ConfigParser: gpg_encrypt->%(gpg_command)s -c --verbose --no-use-agent --batch --yes --passphrase-fd %(passphrase_fd)s -o %(output_file)s %(input_file)s
DEBUG: ConfigParser: gpg_passphrase->...-3_chars...
DEBUG: ConfigParser: guess_mime_type->True
DEBUG: ConfigParser: host_base->127.0.0.1:7480
DEBUG: ConfigParser: host_bucket->%(bucket)s.s3.amazonaws.com
DEBUG: ConfigParser: human_readable_sizes->False
DEBUG: ConfigParser: invalidate_default_index_on_cf->False
DEBUG: ConfigParser: invalidate_default_index_root_on_cf->True
DEBUG: ConfigParser: invalidate_on_cf->False
DEBUG: ConfigParser: kms_key->
DEBUG: ConfigParser: limit->-1
DEBUG: ConfigParser: limitrate->0
DEBUG: ConfigParser: list_md5->False
DEBUG: ConfigParser: log_target_prefix->
DEBUG: ConfigParser: long_listing->False
DEBUG: ConfigParser: max_delete->-1
DEBUG: ConfigParser: mime_type->
DEBUG: ConfigParser: multipart_chunk_size_mb->15
DEBUG: ConfigParser: multipart_max_chunks->10000
DEBUG: ConfigParser: preserve_attrs->True
DEBUG: ConfigParser: progress_meter->True
DEBUG: ConfigParser: proxy_host->
DEBUG: ConfigParser: proxy_port->0
DEBUG: ConfigParser: put_continue->False
DEBUG: ConfigParser: recursive->False
DEBUG: ConfigParser: recv_chunk->65536
DEBUG: ConfigParser: reduced_redundancy->False
DEBUG: ConfigParser: requester_pays->False
DEBUG: ConfigParser: restore_days->1
DEBUG: ConfigParser: restore_priority->Standard
DEBUG: ConfigParser: secret_key->Am...37_chars...k
DEBUG: ConfigParser: send_chunk->65536
DEBUG: ConfigParser: server_side_encryption->False
DEBUG: ConfigParser: signature_v2->False
DEBUG: ConfigParser: signurl_use_https->False
DEBUG: ConfigParser: simpledb_host->sdb.amazonaws.com
DEBUG: ConfigParser: skip_existing->False
DEBUG: ConfigParser: socket_timeout->300
DEBUG: ConfigParser: stats->False
DEBUG: ConfigParser: stop_on_error->False
DEBUG: ConfigParser: storage_class->
DEBUG: ConfigParser: throttle_max->100
DEBUG: ConfigParser: upload_id->
DEBUG: ConfigParser: urlencoding_mode->normal
DEBUG: ConfigParser: use_http_expect->False
DEBUG: ConfigParser: use_https->False
DEBUG: ConfigParser: use_mime_magic->True
DEBUG: ConfigParser: verbosity->WARNING
DEBUG: ConfigParser: website_endpoint->http://%(bucket)s.s3-website-%(location)s.amazonaws.com/
DEBUG: ConfigParser: website_error->
DEBUG: ConfigParser: website_index->index.html
DEBUG: Updating Config.Config cache_file ->
DEBUG: Updating Config.Config follow_symlinks -> False
DEBUG: Updating Config.Config verbosity -> 10
DEBUG: Unicodising 'ls' using UTF-8
DEBUG: Unicodising 's3://tenant_test_1:test-20181008' using UTF-8
DEBUG: Command: ls
DEBUG: Bucket 's3://tenant_test_1:test-20181008':
DEBUG: CreateRequest: resource[uri]=/
DEBUG: Using signature v2
DEBUG: SignHeaders: u'GET\n\n\n\nx-amz-date:Fri, 23 Nov 2018 10:01:05 +0000\n/tenant_test_1%3Atest-20181008/'
DEBUG: Processing request, please wait...
DEBUG: get_hostname(tenant_test_1:test-20181008): 127.0.0.1:7480
DEBUG: ConnMan.get(): creating new connection: http://127.0.0.1:7480
DEBUG: non-proxied HTTPConnection(127.0.0.1, 7480)
DEBUG: format_uri(): /tenant_test_1:test-20181008/?delimiter=%2F
DEBUG: Sending request method_string='GET', uri=u'/tenant_test_1:test-20181008/?delimiter=%2F', headers={'Authorization': u'AWS LMYKYEL95584F6ARSZ2R:aFJdIlMU2TT0uQF7Kv8pEARJTLM=', 'x-amz-date': 'Fri, 23 Nov 2018 10:01:05 +0000'}, body=(0 bytes)
DEBUG: ConnMan.put(): connection put back to pool (http://127.0.0.1:7480#1)
DEBUG: Response:
{'data': 'SignatureDoesNotMatchtx000000000000001fd3dbe-005bf7cfe1-119d18-tupu-zone1119d18-tupu-zone1-tupu-zonegroup',
'headers': {'accept-ranges': 'bytes',
'content-length': '211',
'content-type': 'application/xml',
'date': 'Fri, 23 Nov 2018 10:01:05 GMT',
'x-amz-request-id': 'tx000000000000001fd3dbe-005bf7cfe1-119d18-tupu-zone1'},
'reason': 'Forbidden',
'status': 403}
DEBUG: S3Error: 403 (Forbidden)
DEBUG: HttpHeader: date: Fri, 23 Nov 2018 10:01:05 GMT
DEBUG: HttpHeader: content-length: 211
DEBUG: HttpHeader: x-amz-request-id: tx000000000000001fd3dbe-005bf7cfe1-119d18-tupu-zone1
DEBUG: HttpHeader: content-type: application/xml
DEBUG: HttpHeader: accept-ranges: bytes
DEBUG: ErrorXML: Code: 'SignatureDoesNotMatch'
DEBUG: ErrorXML: RequestId: 'tx000000000000001fd3dbe-005bf7cfe1-119d18-tupu-zone1'
DEBUG: ErrorXML: HostId: '119d18-tupu-zone1-tupu-zonegroup'
ERROR: S3 error: 403 (SignatureDoesNotMatch)

i note that "DEBUG: ConfigParser: signature_v2->False", but it still use "DEBUG: Using signature v2", why ???? is this a bug???