Getting a 401-Unauthorized Error on REST API for Bamboo intermittently

[atltools]

Hi,

Getting a 401-Unauthorized Error on REST API for Bamboo intermittently.

Here are the some command outputs

bil@mini:~ %>curl -skv -o /dev/null -H 'Authorization: Basic YmFtYm9vX3VleDo0UFN1dm44OQ==' 'https://atlassian.hq.k.grp/bamboo_es/rest/api/latest/result.json?os_authType=basic&max-results=200&favourite&expand=results.result' 2>&1 | grep '< HTTP/1.1 '

< HTTP/1.1 401 Unauthorized

bil@mini:~ %>curl -skv -o /dev/null -H 'Authorization: Basic YmFtYm9vX3VleDo0UFN1dm44OQ==' 'https://atlassian.hq.k.grp/bamboo_es/rest/api/latest/result.json?os_authType=basic&max-results=200&favourite&expand=results.result' 2>&1 | grep '< HTTP/1.1 '

< HTTP/1.1 401 Unauthorized

bil@mini:~ %>curl -skv -o /dev/null -H 'Authorization: Basic YmFtYm9vX3VleDo0UFN1dm44OQ==' 'https://atlassian.hq.k.grp/bamboo_es/rest/api/latest/result.json?os_authType=basic&max-results=200&favourite&expand=results.result' 2>&1 | grep '< HTTP/1.1 '

< HTTP/1.1 200 OK

Any help on this appriciated.