No packets available, Data buffer allocations failed

[Nikhil Komalan]

Hello,

I left my open thread FTD devices  in debug mode overnight to see what could be the possible issue why my FTD device gets disconnected from network. Currently in my setup i have 2 FTD devices (COAP client) transmitting data at 200ms to third FTD device acting as COAP server.

Although my device hasn't been disconnected from network yet, but the log shows the following output:

I: nRF5 802154 radio initialized
I: 8 Sectors of 4096 bytes
I: alloc wra: 4, 9c0
I: data wra: 4, 8c0
I: State changed! Flags: 0x101fc310 Current role: 0
*** Booting Zephyr OS build v2.4.99-ncs2  ***
I: Start CoAP-client sample
I: Connection is broken
D: CoAP socket receive thread started
I: OpenThread version: OPENTHREAD/gaad6518ee; Zephyr; Jul 20 2021 18:09:35
I: Network name: ot_zephyr
I: State changed! Flags: 0x0100103d Current role: 1
I: Connection is broken
I: Connection is broken
I: Connection is broken
I: Connection is broken
I: State changed! Flags: 0x100010e5 Current role: 4
I: State changed! Flags: 0x00000200 Current role: 4
E: No pkt available
E: Data buffer (127) allocation failed.
E: No pkt available
E: Data buffer (73) allocation failed.
E: No pkt available
I: Device suspended
I: Device disconnected

Can anyone tell what this issue tells.

[Jonathan Hui]

These log messages are specific to Zephyr and possibly Nordic's SDK. I would reach out to Nordic DevZone for support.

If I had to guess, the log messages indicate that the radio is not sending/receiving messages and could indicate an issue in the radio driver.

--

Jonathan Hui

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[Nikhil Komalan]

Okay thanks for info  I have already created a thread on Nordic devzone.

Just one more thing i would like to know, i received this error just once whole night and the device was transmitting data to COAP server and in morning i saw the data is being received by the COAP server.

So this error doesn't haults my MCU