Opened 7 years ago

Closed 6 years ago

#1043 closed defect (fixed)

Streaming dup SYN detection

Reported by: zzz Owned by:
Priority: minor Milestone: 0.9.12
Component: streaming Version: 0.9.7.1
Keywords: Cc: Zlatin Balevsky
Parent Tickets: Sensitive: no

Description

Check if we do a good job of detecting and discarding duplicate SYN packets. In eepsite logs it's easy to find multiple GETs for the same thing from the same dest, a few seconds apart. Are those due to browser retransmissions (meaning there's nothing we can do) or are we seeing two SYNs with the same conn ID, and treating them as two separate conns? Needs research. Maybe something is broken or maybe not.

If connections get cleaned up faster than they do now (see #1039 #1040 #1041 #1042) then the problem may get a lot worse, and we may need an additional lru cache for conn ids.

Subtickets

Change History (2)

comment:1 Changed 7 years ago by Zlatin Balevsky

Cc: Zlatin Balevsky added

comment:2 Changed 6 years ago by zzz

Milestone: 0.9.9 → 0.9.12
Resolution: → fixed
Status: new → closed

Recently-closed connections tracked as of 0.9.12 with an LRU cache as described in OP.

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