Bug fix for "Java Hangs When Converting 2.2250738585072012e-308" for SAPJVM

Hi All,
There is a new java runtime security alert found (see URL below) :
Java Hangs When Converting 2.2250738585072012e-308
http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308/
I'm wondering if any of you noticed this bug ? Does SAP JVM (various versions) also exsibit this
bug too ?
Thanks,
Ying-Jie Chen

Just to add:
Note 1556366 - Java Runtime hangs when converting a certain number
Markus

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Data Transfer
During the process of data transfer, data is transferred into the SAP R/3 System. This transfer is from an external system to SAP R/3 system. Whenever you transfer data from an external system into an R/3 System, you can use data transfer because it is installed and regularly transfers data from an external system into an R/3 System.
As discussed, with the help of BDC, you can transfer the required data from a non-SAP system to an SAP system. For this kind of data transfer you are required to write an ABAP program. This ABAP program would help to export the concerned data to a sequential dataset file. The data in this file has to be stored. This should be stored in a format, which is acceptable to SAP batch input program. But, to transfer data from a SAP system to another SAP system, you can take the aid of RFC or CPI-C.
SAP application supports the data transfer of numerous SAP business objects. The said data transfer program specifies the data format definition, which is necessary to import the data into the R/3 System. There are three methods available for transferring data:
Direct Input:
In this method the SAP function modules execute the consistency checks. However, there are other means of checking with the help of screens. The Direct Input Method has considerable performance advantages.
Call Transaction:
In this method you can check the data consistency with the help of screen logic.
Batch Input Session:
In this method data consistency is checked with the help of screen logic.
Direct Input Method
Among the methods of data transfer through BDC, direct input method is the one that is used, especially in case of transferring large amount of data. In order to enhance the batch input procedure, the system offers you with the direct input technique.
There is a distinction between the batch input technique and this technique. Unlike batch input technique, this technique does not create sessions. Instead, it stores the data directly. Moreover, it does not process screens. The data has to be entered directly into the corresponding database tables. The system calls a number of function modules which execute necessary checks, if any required. In the case of errors, the direct input technique has a facility to restart the entire mechanism. However, if you want to restart the entire mechanism in case you faced an error, then direct input programs must be executed in the background only. One has to use program RBMVSHOW or Transaction BMV0 to maintain and start these programs.
Call Transaction Method
Call Transaction method is another method used for Data Transfer. In this type of method your program will use the ABAP statement CALL TRANSACTION USING in order to run a SAP transaction. In this type external data need not be deposited in a session for being processed later on. Instead, the entire batch input process takes place inline in your program.
Here, the data transfer program must convert the data that has to be transferred into the SAP system. This is as per requirement by the SAP data structure or the transaction which is using it. It is to be remembered that a conversion of the data types may be necessary at different times during the process.
Suppose there is a data type mismatch then you have to convert the data types to type C. In this regard the data transfer program should be capable of exporting the data in SAP format to the sequential file. At the time of uploading the data into the SAP system, the BDC program reads the data from the abovementioned sequential file.
Batch Input Session Method
This is the third method for data transfer. If you use the batch input method to transfer data, then you should remember that an ABAP program has to read the external data which is to be entered in the R/3 System. Subsequently, it stores the concerned data a "batch input session." The batch Input session records the actions which are required in the process of transferring data into the system. This can be done by using normal SAP transactions.
As soon as the program generates the said session, you will be able to run the session in order to execute the SAP transactions in it. Moreover, you can start the session, and at the same time, can monitor a session with the help of batch input management function. For this you have to choose:
System à Services à Batch input. Moreover, you can have the session run in the background processing.
Writing a Data Transfer Program
If you want to write a data transfer program, you have to follow the steps mentioned below.
Firstly, you will analyze the structure of the existing data. Subsequently, your job is to specify the conversions, which are essential to fill the SAP data structures.
Secondly, you have to generate the SAP data structure. In case the program is written in ABAP, you will require only the required tables in the concerned program with the help of TABLES statement.
Thirdly, you will have to initialize the SAP data structure.
Fourthly, fill the structure with data, performing any conversions and error checking that are required.
Finally, you will write the sequential file. In the SAP system this sequential file is typically required for making the data available to the batch input program.
Batch Input Method
Batch input method is a type of data transfer method. It is used for bulk data transfer; it is one of the primary ways by which data can transferred into the R/3 System. This method is not for near real-time data transfers.
There are various typical uses of batch input. One of the ways includes the one-time import of data. This import of data is from a legacy system into a newly installed R/3 System. In addition to it, another typical use is for periodic (i.e. hourly, daily..., and so on) transfers of data. These transfers are from external systems or legacy systems which are still in use into R/3 system where all enterprise data is consolidated.
The R/3 applications deliver different programs for batch input, which are ready to be used. However, in some cases a customer has to write his or her own batch input program. This is required in order to convert the concerned data from a legacy System or from a proprietary format into an R/3 data format.
The process flows for a batch input are discussed below.
Data Transfer Decision-Making: It is with a decision to transfer data from an external source into R/3 that the process of batch input begins. It is probable that the external source may be a legacy system that is being replaced. A one-time bulk data transfer is foreseen in this regard. Alternatively, the external source may be an external system that is to remain in use. In this case, a regularly recurring bulk data transfer is foreseen.
Setting up Batch-Input for Data Transfers: If R/3 standard one-time or regular data transfers are required, then by means of customizing settings in the R/3 Customizing System in SAP ASAP set up will occur. You must set up custom batch input procedures by hand, which means the system administrator must schedule the data conversion program that creates the batch input session. The system administrator and the batch input programmer must determine the following: how frequently data is made available from the external system, how frequently the conversion program should run, and whether the conversion program runs in R/3 (ABAP program) or in a host system (external program).
Processing Batch Input Sessions: When a batch input session is processed, then the actual transfer of data into R/3 takes place. Little attention is required in processing of batch input sessions by the system administrator. Usually, the starting of batch input sessions is automated by the system administrator. If necessary, the administrators can also start batch input session explicitly from transaction SM35.
Checking Batch Input Sessions: For a system administrator the routine activity is to check daily or more frequently in transaction SM35 whether all batch input sessions have been completed successfully. It is the schedule for running batch input sessions on which the schedule for checking sessions depends upon. For doing this check the R/3 System provides easy-to-use batch input management tools.
Analyzing Errors: It is the duty of the system administrator to analyze the problem if one or more transactions in a session end in errors. Usually, the assistance of the affected data entry specialist or department for this analysis will be needed by the system administrator. In the situation where the problem was caused by incorrect data conversion or incorrect generation of the batch input session then the programmer who wrote the data conversion program may also need to be involved.
Error Handling in Batch Input Method
It is found that most problems usually fall into one of the following two categories discussed below.
In this case either required data is missing from the batch-input session or invalid data has been included in the session. Errors in the data conversion program or the presence of unexpected types of data or incorrect data in the legacy database are the possible external causes of this type of problem. Within R/3, the causes for this type of problem include incorrect or incomplete customizing in an application. For example, a legacy data type may not have been foreseen in the check table entries made in application customizing.
This case mainly includes technical/programming problems. The data is entered by a batch input session by running R/3 transactions non-interactively. Therefore, a typical technical or programming problem is the incorrect identification of one of the data fields in a transaction. Thus, the conversion program may not fill a required data field or may have provided invalid values.
Conclusion
I have gone through the details of batch data communication and various methods used to transfer data. One can make use of BDC to transfer data from a SAP to SAP system. In addition, it can transfer data from a non SAP system to SAP system too. I have discussed the various methods of BDC and the error handling in the respective methods.
Thanks,
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Bug fix for "Java Hangs When Converting 2.2250738585072012e-308" for SAPJVM

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