Log fields
This topic describes the operation log fields for queue messages and topic messages in Simple Message Queue (formerly MNS).
Operation logs of queue messages
Operation logs of queue messages are generated when operations are performed on queue messages, for example, when you send, consume, and delete messages. Each operations log contains multiple fields that indicate different information. The fields contained in a log vary based on different operations. The following tables describe the log fields and the relationships between the operation types and log fields.
Log fields
Each operations log contains multiple fields. The following table describes the fields.
Field
Description
Time
The time when the operation is performed.
MessageId
The ID of the message involved in the operation.
QueueName
The ID of the queue involved in the operation.
AccountId
The Alibaba Cloud account or RAM user to which the queue belongs.
RemoteAddress
The endpoint of the client that performs the operation.
NextVisibleTime
The time when the message is visible after the operation is complete.
ReceiptHandleInRequest
The value of the ReceiptHandle parameter that is passed into the request when the operation is performed.
ReceiptHandleInResponse
The value of the ReceiptHandle parameter that is returned after the operation is complete.
ProcessTime
The duration in which the operation is performed.
RequestId
The ID of the operation.
Action
The specific action of the operation. Valid values: Delete and Send.
Fields of different operations
Logs that are generated by different operations contain different fields. The following table shows the log fields of different operations.
Operation
Time
QueueName
AccountId
MessageId
RemoteAddress
NextVisibleTime
ReceiptHandleInResponse
ReceiptHandleInRequest
SendMessage/BatchSendMessage
Yes
Yes
Yes
Yes
Yes
Yes
No
No
PeekMessage/BatchPeekMessage
Yes
Yes
Yes
Yes
Yes
No
No
No
ReceiveMessage/BatchReceiveMessage
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
ChangeMessageVisibility
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
DeleteMessage/BatchDeleteMessage
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Operation logs of topic messages
Operation logs of topic messages are generated when operations are performed on topic messages, for example, when messages are published and pushed. The following tables describe the log fields and the relationships between the operation types and log fields.
Log fields
Each operations log contains multiple fields. The following table describes the fields.
Field
Description
Time
The time when the operation is performed.
MessageId
The ID of the message involved in the operation.
TopicName
The ID of the topic involved in the operation.
SubscriptionName
The ID of the subscription involved in the operation.
AccountId
The Alibaba Cloud account or RAM user to which the topic belongs.
RemoteAddress
The endpoint of the client that performs the operation.
NotifyStatus
The status code or error message returned when Simple Message Queue (formerly MNS) pushes a message to a client.
ProcessTime
The duration in which the operation is performed.
MessageTag
The tags of the message.
RequestId
The ID of the operation.
Action
The specific action of the operation. Valid values: Delete and Send.
Fields of different operations
Logs that are generated by different operations contain different fields. The following table shows the log fields of different operations.
Operation
Time
MessageId
TopicName
SubscriptionName
AccountId
RemoteAddress
NotifyStatus
SubscriptionName
PublishMessage
Yes
Yes
Yes
No
Yes
Yes
No
No
Notify
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
NotifyStatus
NotifyStatus is a field that identifies the reason why Simple Message Queue (formerly MNS) fails to push messages to endpoints. The following table describes the error codes and the corresponding solutions.
Error code
Description
Recommended solution
2xx
The message is pushed.
N/A
Other HTTP status codes
After the message is pushed to the endpoint, an HTTP status code other than 2xx is returned.
Check the processing logic of the endpoint.
InvalidHost
The specified endpoint in the subscription is invalid.
Use the curl or telnet command to check whether the specified endpoint in the subscription is valid.
ConnectTimeout
MNS failed to connect to the specified endpoint in the subscription.
Use the curl or telnet command to check whether the specified endpoint in the subscription is accessible.
ConnectFailure
MNS failed to connect to the specified endpoint in the subscription.
Use the curl or telnet command to check whether the specified endpoint in the subscription is accessible.
UnknownError
An unexpected error has occurred.
Contact the Simple Message Queue (formerly MNS) technical support.