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project-chip / connectedhomeip

Matter (formerly Project CHIP) creates more connections between more objects, simplifying development for manufacturers and increasing compatibility for consumers, guided by the Connectivity Standards Alliance.
https://buildwithmatter.com
Apache License 2.0
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[BUG] CHIP_ERROR_OUTBOUND_MESSAGE_TOO_BIG when querying attributes #30908

Open pachuho opened 11 months ago

pachuho commented 11 months ago

Reproduction steps

  1. arm 32-bit environment build
  2. Commissioning specific devices (type: thermo-hygrometer, vid:65521, pid: 32773)
  3. Attribute Query
...
Command failed chip.devicecontroller.ChipClusterException: CHIP cluster error: 195

Bug prevalence

About five minutes after the Commissioning

GitHub hash of the SDK that was being used

2e9c162

Platform

android

Platform Version(s)

No response

Anything else?

I'm using an unauthenticated Matter device. However, for other unauthenticated devices (light bulbs), I could see that the attributes are searched normally. I want an answer about what the difference is and why the CHIP_ERROR_OUTBUND_MESSAGE_TOO_BIG error occurs. If possible, please also give me a solution.

CHIPError.h image

bzbarsky-apple commented 11 months ago

CHIP_ERROR_OUTBOUND_MESSAGE_TOO_BIG can happen for two reasons:

  1. Over BLE, if there are chained buffers involved and CompactHead can't fit all the data into a single buffer.
  2. Over a UDP transport, if sendmsg doesn't send the full message.

The one line from the log above is missing too much context to be able to tell which of those cases it falls into. Please attach (not paste) complete logs.

pachuho commented 11 months ago

@bzbarsky-apple Thank you for your answer. It's not what I tested, I requested the log and I'll attach it additionally when I get it. Thank you.