use jenkins pipeline upload files timeout

[g5niusx]

Jenkins Artifactory Plugin verions: 3.2.2

i use jenkins pipeline script upload files to artifactory.

def itemList = []
def item = """
{
"pattern":"test.jar",
"target":"test.jar",
"props":"key=value"
}
"""
itemList.add(item)
rtUpload {
   serverId: 'test',
    spec: """
         {
         "files":${itemList}
      }
     """
}

Sometimes timeouts occur,it's read timeout. thanks