目录

backgroundTaskManager Error Codes

This topic describes only module-specific error codes. For details about universal error codes, see Universal Error Codes.

9800001 Memory Operation Failure

Error Message

Memory operation failed.

Description

This error code is reported when a memory operation fails.

Possible Causes

  1. A memory leak occurs.
  2. The system memory is insufficient.

Solution

  1. Release the memory.
  2. Check whether memory leak occurs.

9800002 Parcel Operation Failure

Error Message

Failed to write data into parcel. Possible reasons: 1. Invalid parameters; 2. Failed to apply for memory.

Description

When an API related to a continuous task is called, the read or write operation fails during IPC.

Possible Causes

  1. The data object fails to be read or written during IPC.

  2. The memory fails to be allocated for the read or write operation.

    During RPC, the sender can use the write() method provided by MessageParcel to write data in specific format to a MessageParcel object. The receiver can use the read() method provided by MessageParcel to read data in specific format from a MessageParcel object.

Solution

Try again later or restart the device.

9800003 IPC Failure

Error Message

Internal transaction failed.

Description

This error code is reported when IPC fails.

Possible Causes

IPC fails.

Solution

Try again later or restart the device.

9800004 System Service Failure

Error Message

System service operation failed.

Description

When an API related to a continuous task is called, the client process fails to request the system service.

Possible Causes

  1. The system service is not started.
  2. The system service is abnormal.

Solution

Try again later or restart the device.

9800005 Continuous Task Verification Failure

Error Message

Continuous task verification failed.

Description

This error code is reported when continuous task verification fails.

Possible Causes

  1. The application repeatedly requests a continuous task.
  2. The application repeatedly cancels a continuous task.
  3. The value of bgMode is invalid because no continuous task type is configured for backgroundModes in the application's configuration file.
  4. Only specific devices can request continuous tasks of the TASK_KEEPING type.
  5. The main type or subtype of the continuous task is not configured.
  6. The main type and subtype of the continuous task are not of the same length or type.
  7. The main type or subtype of the continuous task is not defined.
  8. The input continuousTaskId is invalid.
  9. The data transmission type does not support notification combination.
  10. The continuous task notification does not exist and cannot be combined.
  11. Neither the current continuous task nor the target continuous task supports notification combination.
  12. The continuous task types of the combined notifications are inconsistent.
  13. The application has not obtained ACL authorization when requesting the TASK_KEEPING continuous task.
  14. The data transmission type does not support updating the continuous task type via the update API.
  15. A new continuous task type (other than audio playback) is requested in the background.
  16. The application has not obtained ACL authorization when requesting a continuous task of the MODE_SPECIAL_SCENARIO_PROCESSING type.

Solution

  1. Check the application code.
  2. Check whether the application has the system permissions.
  3. Check the type of the device where the application is located.
  4. Check the value of backgroundModes.
  5. Check whether the main type and subtype of the continuous task are configured.
  6. Check whether the main type and subtype of the continuous task are of the same length or whether their types match.
  7. Check whether the main type and subtype of the continuous task are out of range.
  8. Check whether the input continuousTaskId parameter is valid.
  9. During notification combination, check whether the requested continuous task type includes the data transmission type.
  10. During notification combination, check whether the continuous task notification exists.
  11. During notification combination, confirm whether the current continuous task or the target continuous task supports notification combination.
  12. During notification combination, check whether the continuous task types are consistent.
  13. When applying for the TASK_KEEPING continuous task, verify whether the ACL authorization for ohos.permission.KEEP_BACKGROUND_RUNNING_SYSTEM has been obtained.
  14. When updating the continuous task, check whether either the original type or the new type includes the data transmission type.
  15. Check if any background continuous tasks are being requested, other than audio playback or continuous tasks that have already been requested in the foreground.
  16. Check whether the application has obtained the ohos.permission.KEEP_BACKGROUND_RUNNING_SPECIAL_SCENARIO or ohos.permission.KEEP_BACKGROUND_RUNNING_SYSTEM ACL authorization when requesting a continuous task of the MODE_SPECIAL_SCENARIO_PROCESSING type.

9800006 Notification Verification Failure for a Continuous Task

Error Message

Notification verification failed for a continuous task.

Description

This error code is reported when notification verification in a continuous task fails.

Possible Causes

  1. The continuous task resources cached in the resource subsystem fail to be loaded.
  2. The notification subsystem functions abnormally.

Solution

  1. Check whether the continuous task resource ohos.backgroundtaskmgr.resources exists.
  2. Try again later or restart the device.

9800007 Continuous Task Storage Failure

Error Message

Continuous task storage failed.

Description

This error code is reported when information storage in a continuous task fails.

Possible Causes

  1. Failed to create a file to store the task information.
  2. Failed to obtain the file path.
  3. Failed to open the file that stores the task information.

Solution

  1. Check the /data/service/el1/public/background_task_mgr/running_task file.
  2. Try again later or restart the device.

9900001 Caller Information Verification Failure for a Transient Task

Error Message

Caller information verification failed for a transient task.

Description

This error code is reported when caller information verification in a transient task fails.

Possible Causes

  1. The UID or PID of the caller fails to be obtained. As a result, the verification fails.
  2. The bundle name of the caller fails to be obtained. As a result, the verification fails.
  3. The request ID passed in the API used to cancel the transient task is invalid.

Solution

  1. Check whether the application UID exists.
  2. Check whether the application has requested a transient task.
  3. Try again later or restart the device.

9900002 Transient Task Verification Failure

Error Message

Transient task verification failed.

Description

This error code is reported when transient task verification fails.

Possible Causes

  1. The callback passed in requestSuspendDelay() already exists.
  2. The callback passed in cancelSuspendDelay() does not exist.
  3. The application attempts to request a transient task 5 seconds after it switches to the background.
  4. The application has already requested three transient tasks.
  5. The application's daily quota for transient tasks is used up.

Solution

  1. Check the application code.
  2. The application should cancel transient tasks immediately after they are complete.

9900003 Parcel Operation Failure

Error Message

Failed to write data into parcel. Possible reasons: 1. Invalid parameters; 2. Failed to apply for memory.

Description

When an API related to a transient task is called, the read or write operation fails during IPC.

Possible Causes

  1. The data object fails to be read or written during IPC.

  2. The memory fails to be allocated for the read or write operation.

    During RPC, the sender can use the write() method provided by MessageParcel to write data in specific format to a MessageParcel object. The receiver can use the read() method provided by MessageParcel to read data in specific format from a MessageParcel object.

Solution

Try again later or restart the device.

9900004 System Service Failure

Error Message

System service operation failed.

Description

When an API related to a transient task is called, the client process fails to request the system service.

Possible Causes

  1. The system service is not started.
  2. The system service is abnormal.

Solution

Try again later or restart the device.