JAVA上传文件到OSS异常

[ERROR] 2018-11-21 11:24:16,193 - 服务器异常:
com.aliyun.oss.ClientException: Unknown
        at com.aliyun.oss.internal.OSSObjectOperation.writeObjectInternal(OSSObj
ectOperation.java:852)
        at com.aliyun.oss.internal.OSSObjectOperation.putObject(OSSObjectOperati
on.java:148)
        at com.aliyun.oss.OSSClient.putObject(OSSClient.java:475)
        at com.aliyun.oss.OSSClient.putObject(OSSClient.java:463)
        at com.aliyun.oss.OSSClient.putObject(OSSClient.java:469)