"Python CP-SAT removed the 2GB limit in v9.14 by using C++ protobuf proxies. Is there a similar solution for Java? The current JNI interface still requires byte[] which has the 2GB limit."

[runsheng277795146-dev]

What language and solver does this apply to?
Java

Describe the problem you are trying to solve.
"Python CP-SAT removed the 2GB limit in v9.14 by using C++ protobuf proxies. Is there a similar solution for Java? The current JNI interface still requires byte[] which has the 2GB limit."

[lperron]

yes, but that requires rewriting the equivalent of wrappers library which is in ortools/util/python on the main branch.

This one introspects the proto and should generate JNI code for it.

Unfortunately, we do not have the time to work on it.

[runsheng277795146-dev]

yes, but that requires rewriting the equivalent of wrappers library which is in ortools/util/python on the main branch.

This one introspects the proto and should generate JNI code for it.

Unfortunately, we do not have the time to work on it.

Sinerely, thank you for reply my question. It seems the problem will remain for uncentain time. I was thinking that build the modelfile in Java.Then use C++ or python load the file and solve with output in another solution file. And load back in Java for futher action. Do you think it may be a way to avoid the limition? Or do you hanve any suggestion?

[lperron]

You cannot serialize a proto that uses more than 2 GB Laurent Perron | Operations Research | ***@***.*** | (33) 1 42 68 53 00 Le mer. 11 mars 2026, 07:48, runsheng277795146-dev ***@***.***> a écrit :

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