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Problem with java serialization

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MatEngel

Programmer
Jul 10, 2001
12
DE
I have a type of number crunching program, and as I wanted to be able to interrupt it and continue it later, I put everything in a single control class and several depending classes. At interrupt time, I write the control class (and implicitely the depending classes) with Java Object IO, at restart time, I read it again.

This works fine for the first time - or for the first two or three interrupts. But as the runs are longer (or, perhaps, my class has more subclasses), I just get an IO error that I do not understand. It occurs when I write the control class; my call to writeObject comes (via other classes) to a java.io.IOException: write error.
The problem seems to be reproducable (however, after two runs of about 5 hours, each, on a 300 MHz Windows computer).

Did anybody hear about a similar problem with serialization? Or is it more likely that it is a problem of the system, that was heavily loaded for CPU and virtual memory?

Thanks in advance
 
Meanwhile, I switched to JDK version 1.4 (former version was 1.2 or 1.3 - I am not sure); with the new version, the problem has disappeared.
 
I flushed the object output stream implicitely, by closing it. That holds both for JDK 1.4 and the previous version.
 
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