Add idle timeout to DMSG streams to prevent ephemeral port exhaustion#354
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0pcom merged 1 commit intoskycoin:developfrom Mar 27, 2026
Merged
Add idle timeout to DMSG streams to prevent ephemeral port exhaustion#3540pcom merged 1 commit intoskycoin:developfrom
0pcom merged 1 commit intoskycoin:developfrom
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Streams that complete the handshake but never receive data would block in smux.waitRead indefinitely, holding their ephemeral port forever. Over time this exhausts all ~16K ports (49152-65535) on the Porter, causing "ephemeral port space exhausted" errors for new streams. Fix by adding a 2-minute idle timeout (StreamIdleTimeout) that is: - Set as a read deadline after the stream handshake completes - Refreshed on every successful read, so active streams are unaffected - Applied on both initiating (DialStream) and responding (acceptStream) Stale streams will time out, the caller gets an error, and the stream is closed — releasing its ephemeral port back to the pool.
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Streams that complete the handshake but never receive data would block in smux.waitRead indefinitely, holding their ephemeral port forever. Over time this exhausts all ~16K ports (49152-65535) on the Porter, causing "ephemeral port space exhausted" errors for new streams.
Fix by adding a 2-minute idle timeout (StreamIdleTimeout) that is:
Stale streams will time out, the caller gets an error, and the stream is closed — releasing its ephemeral port back to the pool.