Zktraffic

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Features
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- support python3

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Bug Handling
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- treat empty ('') paths as /

Features
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- zk-stats-daemon now supports --exclude-bytes, which
will skip accounting bytes per path and request type

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Bug Handling
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- add ansicolors to requirements
- --set-cpu-affinity wasn't effective on all threads,
because set_cpu_affinity() was called after spawning
daemon threads

Features
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- zk-omni-dump: zk + fle + zab sniffer with automatic port detection. This
is useful for JUnit testcases where ports are randomly assigned
- zk-stats-daemon now supports --sampling to capture only a % of packets,
which is useful to reduce the amount of consumed CPU time

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Bug Handling
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- zab-dump: createSession's opcode was missing

Features
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- zk-dump: add support for profiling latencies by path/type/client
- zab-dump: don't print learner pings unless --include-pings
- fle-dump/zab-dump: improved test coverage

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Bug Handling
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- per-path aggregation for watches wasn't working
- silence scapy logging
- add missing help strings and their defaults

Features
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-

Breaking changes
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- zk-dump: rename --sort-by to --group-by

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Bug Handling
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- handle IOError for fix zk-dump, fle-dump, zab-dump

Features
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- add --count-requests and --sort-by