JPH07230389A - Error processing method and information processor using this method - Google Patents

Abstract

PURPOSE:To provide the method and the device for error processing which efficiently restart the processing even in the case of the occurrence of error. CONSTITUTION:When a data base update system is started at the time of updating a data base, a picture for the start is displayed (S100). When key input is performed in accordance with the processing thereafter (S101), data is updated in accordance with keys (S104). In this case, error is checked (S105), and it is checked whether the error is dead lock/time-out or not if the error is detected (S106). A message to prompt an operator to reexecution is displayed on the picture displayed at present in the case of dead lock (S108), and the error is displayed on the picture for the start in the case of time-out (S109). Thus, the processing corresponding to the error is performed to efficiently restart the processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an error processing method when an error such as deadlock / timeout occurs in an online system and an information processing apparatus using the error processing method.

[0002]

2. Description of the Related Art Conventionally, when a deadlock / time-out occurs in an information processing device such as an online system, like the other errors related to resource use, the process being executed is stopped to recover the resource, and an error occurs. The situation was displayed on the screen. After that, according to the instruction from the operator, the state before the start of processing was returned.

Further, when an error related to resource use occurs, any application performs the above-mentioned processing, and therefore the error processing procedure is made into a subroutine.

[0004]

However, in the above-described conventional example, when an error relating to resource use occurs, the entire process is unconditionally stopped, and it is impossible to continue the process being executed. Good if an error occurs,
Even if there is a possibility that normal processing can be performed by restarting from the time when the error occurred without stopping the entire processing, such as deadlock / timeout, after setting the interval.
The operation had to be redone from the beginning of the process, which had the drawback of being twice the effort.

Further, when an error that cannot continue the processing occurs, the system is also exited after the processing is completed, and therefore an extra operation such as re-entering the system is required to redo the operation. There was a drawback that it could not proceed smoothly.

Further, in order to solve such a problem,
If the process can be re-executed in case of deadlock / time-out, the re-execution start method may be different for each type of application, and there is a drawback that conventional general-purpose subroutines cannot be modified as they are. .

The present invention has been made in view of the above-mentioned conventional example, and when a deadlock / time-out occurs, an error processing method capable of re-executing the process without redoing the operation up to that point and information using the error processing method. A first object is to provide a processing device.

A second object of the present invention is to provide an error processing method and an information processing apparatus using the error processing method, in which the operation can be redone smoothly when an error other than the deadlock / timeout occurs.

A third object of the present invention is to provide an error processing method capable of performing processing without being aware of deadlock / timeout and other errors, and an information processing apparatus using the error processing method.

[0010]

In order to achieve the above first and second objects, the error processing method of the present invention has the following configuration. That is, an error processing method during data processing in a system including a display unit, a detection step of detecting the occurrence of an error during processing execution, and a determination step of determining the type of error detected by the detection step. ,
When it is determined that the type of error that has occurred in the determination step is deadlock or timeout, a re-execution display step that displays a message prompting re-execution from the state immediately before the error occurs; When it is determined that the type of error is neither deadlock nor timeout, a return display step of displaying that the processing is stopped and the processing is started again is provided.

Further, in order to achieve the above first and second objects, the information processing apparatus of the present invention has the following configuration. That is, an information processing apparatus that processes an error that occurs during data processing, including a detection unit that detects the occurrence of an error during processing execution, a determination unit that determines the type of error detected by the detection unit, and When the type of the error generated by the determination unit is determined to be deadlock or time-out, a re-execution display unit that displays a message prompting re-execution from the state immediately before the error occurs, and an error generated by the determination unit When it is determined that the type is neither deadlock nor time-out, a return display unit that displays that the process is stopped and the process is returned to the start point is provided.

According to another aspect, the structure is as follows.

A database system for updating accumulated data, including display means for displaying an image, detecting means for detecting occurrence of an error during execution of data update processing, and error detecting means for detecting an error detected by the detecting means. The discriminating means for discriminating the type and, when it is determined that the type of the error generated by the discriminating means is deadlock or time-out, displays on the display means to prompt re-execution from the state immediately before the error occurs. And means for displaying on the display unit that the processing is stopped and the processing is returned to the processing start time when it is determined that the type of error generated by the determination means is neither deadlock nor timeout. Be prepared.

Further, in order to achieve the third object,
It has the following configuration.

An information processing apparatus for processing an error occurring during data processing by a data processing unit, wherein a detecting means for detecting occurrence of an error during execution of processing and a kind of error detected by the detecting means are discriminated. A discriminating means, a re-execution displaying means for displaying a message prompting re-execution from a state immediately before the error occurs, when the type of the error generated by the discriminating means is deadlock or timeout; An error processing unit having return display means for displaying that the processing is stopped and the processing is returned to the processing start time when it is determined that the type of error generated by the means is neither deadlock nor timeout. , The error processing unit is shared by a plurality of data processing units.

[0016]

With the above structure, the state of returning is changed according to the error that has occurred, in the case of deadlock / timeout, it returns to the state immediately before the error occurred, and in the case of other errors it returns to the state before processing, and restarts processing from there. Let

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 2 is a block diagram showing the arrangement of an example of the information processing system of this embodiment. In the figure, 11
Is a CPU that controls the system, 12 is a database that is a resource to be processed, 13 is a keyboard that is an input device, 14 is a display device that displays input items and messages,
Reference numeral 15 is a memory that stores data and a program executed by the CPU 11.

FIGS. 1 to 3 are flow charts showing a processing procedure such as database search / update executed by the system of this embodiment. The procedure of these flowcharts is performed by executing the program stored in the memory 15 in the CPU 11
It is realized by executing.

In the database system, when updating data, in order not to cause a semantic contradiction between the data, the data is locked in a predetermined block unit such as a record, and the data is locked with other processes. Preventing simultaneous updates. After locking all the data to be updated,
For the first time, the actual update is done. The deadlock in the database system occurs, for example, when a plurality of processes conflict with each other when locking this data and hold a locked block. Of course, it can also be caused by holding other resources. Such a deadlock state is often not detected as a deadlock during the process execution, but is detected as a time-out error that occurs because the process is delayed and does not end within a predetermined time. In addition to the deadlock, the timeout occurs when necessary resources cannot be obtained.

The system of the present embodiment efficiently eliminates such an error state.

Referring to FIG. 1, the process in the present embodiment is performed by a start screen display step S100, a key input step S101, and a return instruction determination step S1 for returning to the start screen.
02, a step S103 of returning to the start screen, a step S104 of updating a database by an input item, a step S105 of detecting a database processing error, a step S106 of recovering a database when an error occurs, a step S107 of detecting a deadlock / timeout, It includes a re-execution message display step S108, an abnormal end message display step S109, and a step S110 of returning to the head of the application.

FIG. 3 shows a step S in the procedure of FIG.
This is a subroutine (step S306) from step S109 to step S109.

FIG. 4 is a flowchart showing the processing of the error processing subroutine (step S306) in FIG.
Corresponding to steps S106 to S109.

Next, the processing contents of the present embodiment having the above-mentioned configuration will be described along the flow of the flowchart.

First, when the database search / update system for searching / updating the database is started by the operator, the start screen is displayed on the display device 14 (step S100) and the subsequent input is awaited. When data is input from the keyboard 13 for updating the database 12 (step S101), it is determined whether or not it is the CLEAR key (step S102). If the determination is NO, the database 12 is updated according to the input data. Is performed (step S104). This update process consists of one or a plurality of processes for updating the data. CPU11
Detects an error in this update process (step S105), and if an error is detected, performs a recovery process on the database 12 (step S106).

Further, the detected error is deadlock /
It is determined whether or not a time-out has occurred (step S107), and if a deadlock / time-out has occurred, a message "There is a DB currently in use by another user" is displayed on the screen currently displayed on the display device 14 to re-execute the processing in which the error occurred. Please wait for a while and try again ”is displayed (step S
108).

For other errors, the screen displayed on the display device 14 is switched to the start screen, and the error message "There is an inconsistency in the DB and the processing cannot be continued. CLE
Please finish with AR ”is displayed (step S10
9) and returns to step S101 (step S110).

Therefore, when a deadlock / timeout occurs, the screen is still displayed, and therefore the process can be re-executed without redoing the operation up to that point.

On the other hand, when an error other than deadlock / timeout occurs, the series of processes is stopped, and if the CLEAR key is pressed in accordance with the displayed message, the determination in step S102 becomes YES and the process returns to the start screen (step S103). ).

Further, in FIG. 3, steps S301 to S305 are the same as those in FIG.
When an error is detected in 305, the error processing subroutine is called (step S306). In the error processing subroutine, steps S401 to S40 in FIG.
4, step S106 to step S109 of FIG.
Perform the same process as. Then return to the main routine,
Similarly to step S301, the process returns to step S301 (step S30).
7).

Therefore, when a deadlock / time-out occurs, since the screen is still displayed, the process can be re-executed without redoing the operation up to that point.

On the other hand, if an error other than the deadlock / timeout occurs and the CLEAR key is pressed in accordance with the displayed message, the determination at step 2 is YES.
It becomes S and returns to the start screen (step S303).

As described above, in the system of this embodiment, when an error relating to resource use occurs, the resource is recovered, this error is judged, and when the deadlock / time is judged, the currently displayed screen is displayed. When a deadlock / time-out occurs by displaying a message prompting you to re-execute the process, and if a deadlock / time-out occurs, the screen remains displayed and the process is re-executed without redoing the operation up to that point. Therefore, there is an effect that the labor can be saved twice.

On the other hand, when an error other than deadlock / timeout occurs, the screen is switched to the start screen, an error message is displayed, and the process returns to the start screen by returning to the beginning of the application. There is an effect that the re-doing can be smoothly performed.

Further, if the error processing section is made into a subroutine, the programmer can use this to execute CA.
By simply returning to the beginning of the main program after LL, it is possible to separate re-execution of processing due to deadlock / timeout and cancellation of processing due to other errors without paying attention to it, thus improving the efficiency of programming. There is also an effect that the development period can be shortened.

[0037]

Other Embodiments Another embodiment of the present invention will be considered for each component of FIG.

Database 1 which is a resource to be processed
2 has resources such as files and data sets other than the database, and the keyboard 13 has an input device such as a mouse and a tablet for inputting various information.

Also, in FIGS. 1 and 3, the instruction to return to the start screen is the CLEAR key.
You can replace it with other function keys or enter keywords.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of a single device. Further, it goes without saying that the present invention can be applied to the case where it is achieved by supplying a program to a system or an apparatus.

[0041]

As described above, the error processing method of the present invention and the information processing apparatus using the same can re-execute the processing without redoing the operation up to that point when a deadlock / time-out occurs. There is an effect.

Further, when an error other than the deadlock / timeout occurs, the operation can be redone smoothly.

Furthermore, there is an effect that processing can be performed without being aware of deadlock / timeout and other errors.

[0044]

[Brief description of drawings]

FIG. 1 is a flowchart showing a process of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an information processing system of this embodiment.

FIG. 3 is a flowchart showing the processing of an embodiment of the present invention.

4 is a flowchart showing the processing of an error processing subroutine in FIG.

[Explanation of symbols]

 1 Key input step 2 Return screen judgment step 3 Start screen return step 5 Resource usage error detection step 6 Resource recovery processing step 7 Deadlock / timeout detection step 8 Processing re-execution message display step 9 Error Message display step 10 Step to return to the top of the application

Claims (8)

[Claims] 1. A method for processing an error during data processing in a system having a display unit, the method comprising: a detection step of detecting an error occurrence during processing; and a type of error detected by the detection step. A discriminating step, and a re-execution display step for displaying a message prompting re-execution from a state immediately before the error occurs when it is discriminated that the type of error generated by the discriminating step is deadlock or timeout. When it is determined that the type of error generated by the step is neither deadlock nor timeout, a return display step of displaying that the processing is stopped and the processing is returned to the start point is provided. Error handling method. 2. The error processing method according to claim 1, wherein the data processing is processing for updating a database. 3. The re-execution display step displays a message prompting re-execution on the screen displayed at the time when the error occurs, and the return display step displays the screen at the time of starting the processing and the processing start. 2. The error processing method according to claim 1, further comprising displaying a message for canceling. 4. An information processing apparatus for processing an error that occurs during data processing, the detecting means detecting an occurrence of an error during processing execution, and a judging means for judging the type of the error detected by the detecting means. And a re-execution display means for displaying a message prompting re-execution from the state immediately before the error occurs when it is determined that the type of error generated by the determination means is deadlock or timeout. When it is determined that the type of error that has occurred is neither deadlock nor time-out, a return display unit that displays that the processing is stopped and the processing is returned to the start time is provided. apparatus. 5. The information processing apparatus according to claim 4, wherein the data processing is processing for updating a database. 6. The re-execution display means displays a message prompting re-execution on the screen displayed at the time when the error occurs, and the return display means displays the screen at the time of starting the processing and the processing start. The information processing apparatus according to claim 4, wherein a message to the effect that it is canceled is displayed. 7. An information processing apparatus for processing an error occurring during data processing by a data processing unit, comprising: detection means for detecting occurrence of an error during execution of processing; and type of error detected by the detection means. Determination means for determining, and a re-execution display means for displaying a message prompting re-execution from a state immediately before an error occurs when it is determined that the type of error generated by the determination means is deadlock or timeout. An error processing unit having return display means for displaying that the processing is stopped and the processing is returned to the processing start time when it is determined that the type of error generated by the determination means is neither deadlock nor timeout. An information processing apparatus, comprising: the error processing unit, wherein the error processing unit is shared by a plurality of data processing units. 8. A database system for updating accumulated data, comprising: display means for displaying an image; detecting means for detecting occurrence of an error during execution of data update processing; and detecting means by the detecting means. The discriminating means for discriminating the type of error and the display means for prompting the re-execution from the state immediately before the error occurs when the type of the error generated by the discriminating means is determined to be deadlock or timeout. Means for displaying, and means for displaying on the display unit that the processing is stopped and the processing is returned to the processing start time when it is determined that the type of error generated by the determination means is neither deadlock nor timeout And a database system comprising: