SplitInputStream: close all underlying streams even if one close fails

[iamsanjaymalakar]

Problem

SplitInputStream wraps multiple InputStreams. In close(), it closes them sequentially without handling exceptions. If one close() throws, the method exits immediately and the remaining streams are never closed.

Fix

• Wrap each stream.close() in a try/catch.
• Continue closing the remaining streams even after a failure.
• After attempting all closes, throw the first exception (and attach later ones as suppressed, if present).