International Business Machines Corporation

Praveen Mohandas

Knut Stolze

Amit P Joglekar

Sunil Sarin

A computer program product for testing a server code in a server concurrently handling multiple client requests includes creating a job-specific breakpoint in the server code using a library application programming interface, the job-specific breakpoint in the server code is enabled or disabled based on a job identifier, the library application programming interface controls the job-specific breakpoint in the server code and includes an application programming interface for establishing a new server connection with the server and retrieving the job identifier from the server associated with the established new server connection, pausing execution of a client job based on enabling the job-specific breakpoint in the server code using the library application programming interface, and resuming execution of the client job based on disabling the job-specific breakpoint in the server code using the library application programming interface.

Testing and reproduction of concurrency issues

A method and system for testing a server code in a server concurrently handling multiple client requests create a job-specific breakpoint in the server code using a library application programming interface (API) that allows the job-specific breakpoint in the server code being enabled or disabled based on a job identifier. The library API controls the job-specific breakpoint in the server code via a plurality of readymade functions that execute, in a desired sequence, various synchronous and asynchronous program paths associated with the multiple client requests. By using the library API, the method and system are capable of establishing a new server connection with the server and retrieving the job identifier from the server associated with the established new server connection, pausing execution of a client job based on enabling the job-specific breakpoint, and resuming execution of the client job based on disabling the job-specific breakpoint.

A method, a processing device, and a computer program product are provided. A truncate table command for truncating all or a subset of one or more rows of a database table is received from a first transaction executing on a processing device. At least one read operation on the truncated database table is performed for at least one transaction concurrent with the first transaction, wherein the truncated rows are visible to the at least one concurrent transaction and invisible to subsequent transactions. Storage units that store the truncated rows are reclaimed in response to completion of the at least one concurrent transaction.

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Bothell, WA, United States of America

Praveen Mohandas