Replaying processing of a restarted application

A computer program product for enabling a replay of a processing of at least one data set by a restarted application, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions executable by a processor to cause the processor to perform a method comprising:

• restarting, utilizing the processor, an application at a second system in response to a failure of the application at a first system;
• receiving, utilizing the processor, replicated logged data from the first system at the second system;
• updating, utilizing the processor, a second data set at the second system to reflect a first data set at the first system, utilizing the replicated logged data;
• during a first replay of the application in response to the failure:
• identifying, utilizing the processor, a first plurality of data reads from the restarted application at the second system, where the first plurality of data reads occur before a predetermined checkpoint;
• in response to the first plurality of data reads, retrieving, utilizing the processor, the replicated logged data from the second system, and returning the replicated logged data to the restarted application at the second system;
• identifying, utilizing the processor, a second failure of the application at the second system;
• and
• restarting, utilizing the processor, the application and performing a second replay of the application, utilizing the predetermined checkpoint and the replicated logged data, where the second failure of the application results in stale read data within the replicated logged data that is skipped over, utilizing a filter.

A system, comprising:

• a processor;
• and
• logic integrated with the processor, executable by the processor, or integrated with and executable by the processor, the logic being configured to:
• restart an application at a second system in response to a failure of the application at a first system;
• receive replicated logged data from the first system at the second system;
• update a second data set at the second system to reflect a first data set at the first system, utilizing the replicated logged data;
• during a first replay of the application in response to the failure:
• identify a first plurality of data reads from the restarted application at the second system, where the first plurality of data reads occur before a predetermined checkpoint;
• in response to the first plurality of data reads, retrieve the replicated logged data from the second system, and returning the replicated logged data to the restarted application at the second system;
• identify a second failure of the application at the second system;
• and
• restart the application and performing a second replay of the application, utilizing the predetermined checkpoint and the replicated logged data, where the second failure of the application results in stale read data within the replicated logged data that is skipped over, utilizing a filter.