Matter Fabric Removal not working

[SubuMuthu]

Product: nRF54L15, SDK:3.0.2, door lock application

Hi, 

When the Matter door lock removed from Apple  Home(Home App, remove accessory), the lock does  not remove all the fabric information. If we  try to re-enroll back to Apple home, it fails.

prj settings: we do not want to factory reset the lock.

CONFIG_CHIP_FACTORY_RESET_ERASE_SETTINGS=y

CONFIG_CHIP_LAST_FABRIC_REMOVED_ERASE_ONLY=y

 Here is the output:

I: 1682289 [EM]>>> [E:40552r S:7602 M:180316078] (S) Msg RX from 1:15EE92BA64B84421 [F4A5] to 00000000C3743D4D --- Type 0001:02 (IM:ReadRequest) (B:51)
I: 1682305 [EM]<<< [E:40552r S:7602 M:11248965 (Ack:180316078)] (S) Msg TX from 00000000C3743D4D to 1:15EE92BA64B84421 [F4A5] [UDP:[fdc7:7c32:4429:e640:4f5:a66c:db71:f7c2]:62363] --- Type 0001:05 (IM:ReportData) (B:70)
I: 1682327 [EM]??1 [E:40552r S:7602 M:11248965] (S) Msg Retransmission to 1:15EE92BA64B84421 in 2094ms [State:Active II:500 AI:300 AT:4000]
I: 1682488 [EM]>>> [E:40552r S:7602 M:180316079 (Ack:11248965)] (S) Msg RX from 1:15EE92BA64B84421 [F4A5] to 00000000C3743D4D --- Type 0000:10 (SecureChannel:StandaloneAck) (B:34)

[1704940622] Updated Matter Power cluster
[1704944642] V: 3187 (in mV), T: 24(in C), Battery charge left: 95%, time-to-empty=nan  0
I: 1722489 [EM]>>> [E:40553r S:7602 M:180316080] (S) Msg RX from 1:15EE92BA64B84421 [F4A5] to 00000000C3743D4D --- Type 0001:02 (IM:ReadRequest) (B:51)
I: 1722505 [EM]<<< [E:40553r S:7602 M:11248966 (Ack:180316080)] (S) Msg TX from 00000000C3743D4D to 1:15EE92BA64B84421 [F4A5] [UDP:[fdc7:7c32:4429:e640:4f5:a66c:db71:f7c2]:62363] --- Type 0001:05 (IM:ReportData) (B:70)
I: 1722527 [EM]??1 [E:40553r S:7602 M:11248966] (S) Msg Retransmission to 1:15EE92BA64B84421 in 2092ms [State:Active II:500 AI:300 AT:4000]
I: 1722687 [EM]>>> [E:40553r S:7602 M:180316081 (Ack:11248966)] (S) Msg RX from 1:15EE92BA64B84421 [F4A5] to 00000000C3743D4D --- Type 0000:10 (SecureChannel:StandaloneAck) (B:34)

[1734940749] Updated Matter Power cluster
[1734944765] V: 3187 (in mV), T: 24(in C), Battery charge left: 95%, time-to-empty=nan  0
I: 1737690 [EM]>>> [E:40554r S:7602 M:180316082] (S) Msg RX from 1:15EE92BA64B84421 [F4A5] to 00000000C3743D4D --- Type 0001:02 (IM:ReadRequest) (B:51)
I: 1737706 [EM]<<< [E:40554r S:7602 M:11248967 (Ack:180316082)] (S) Msg TX from 00000000C3743D4D to 1:15EE92BA64B84421 [F4A5] [UDP:[fdc7:7c32:4429:e640:4f5:a66c:db71:f7c2]:62363] --- Type 0001:05 (IM:ReportData) (B:70)
I: 1737728 [EM]??1 [E:40554r S:7602 M:11248967] (S) Msg Retransmission to 1:15EE92BA64B84421 in 2034ms [State:Active II:500 AI:300 AT:4000]
I: 1737888 [EM]>>> [E:40554r S:7602 M:180316083 (Ack:11248967)] (S) Msg RX from 1:15EE92BA64B84421 [F4A5] to 00000000C3743D4D --- Type 0000:10 (SecureChannel:StandaloneAck) (B:34)
I: 1737909 [EM]>>> [E:40555r S:7602 M:180316084] (S) Msg RX from 1:15EE92BA64B84421 [F4A5] to 00000000C3743D4D --- Type 0001:08 (IM:InvokeCommandRequest) (B:62)
I: 1737925 [ZCL]OpCreds: Received a RemoveFabric Command for FabricIndex 0x1
I: 1737933 [EM]<<< [E:40555r S:7602 M:11248968 (Ack:180316084)] (S) Msg TX from 00000000C3743D4D to 1:15EE92BA64B84421 [F4A5] [UDP:[fdc7:7c32:4429:e640:4f5:a66c:db71:f7c2]:62363] --- Type 0000:10 (SecureChannel:StandaloneAck) (B:34)
I: 1737962 [EM]<<< [E:21165i S:7602 M:11248969] (S) Msg TX from 00000000C3743D4D to 1:15EE92BA64B84421 [F4A5] [UDP:[fdc7:7c32:4429:e640:4f5:a66c:db71:f7c2]:62363] --- Type 0001:05 (IM:ReportData) (B:82)
I: 1737982 [EM]??1 [E:21165i S:7602 M:11248969] (S) Msg Retransmission to 1:15EE92BA64B84421 in 2085ms [State:Active II:500 AI:300 AT:4000]
I: 1738038 [FP]Fabric (0x1) deleted.
I: 1738041 [IM]Deleting expired ReadHandler for NodeId: 15EE92BA64B84421, FabricIndex: 1
I: 1738056 [DMG]Subscription id 0xea087a16 from node <15EE92BA64B84421, 1> torn down
I: 1738065 [ZCL][OnFabricRemoved] Handling a fabric removal from the door lock server [endpointId=1,fabricIndex=1]
E: 1738076 [ZCL][clearFabricFromCredentials] Unable to get max number of credentials to clear - can't get max number of credentials [endpointId=1,credentialType=5]
E: 1738092 [ZCL][clearFabricFromCredentials] Unable to clear fabric from credential - couldn't read credential from database [endpointId=1,credentialType=0,credentialIndex=0,fabricIdToRemove=1]
I: 1738113 [ZCL]OpCreds: Fabric index 0x1 was removed
I: 1738118 [DIS]Updating services using commissioning mode 0
I: 1738124 [DIS]Advertise operational node B012C744E75C0D5A-00000000149A3293
I: 1738132 [DL]removing srp service: 5D40D853319AF4A5-00000000C3743D4D._matter._tcp
I: 1738172 [ZCL]OpCreds: RemoveFabric successful
I: 1738177 [SC]SecureSession[0x200059c0, LSID:7599]: State change 'kDefunct' --> 'kPendingEviction'
I: 1738186 [SC]SecureSession[0x20005a98, LSID:7602]: State change 'kActive' --> 'kPendingEviction'
I: 1738197 [EM]<<< [E:40555r S:7602 M:11248970 (Ack:180316084)] (S) Msg TX from 00000000C3743D4D to 1:15EE92BA64B84421 [0000] [UDP:[fdc7:7c32:4429:e640:4f5:a66c:db71:f7c2]:62363] --- Type 0001:09 (IM:InvokeCommandResponse) (B:70)
I: 1738220 [EM]??1 [E:40555r S:7602 M:11248970] (S) Msg Retransmission to 1:15EE92BA64B84421 in 2091ms [State:Active II:500 AI:300 AT:4000]
I: 1738235 [EM]>>> [E:21165i S:7602 M:180316085 (Ack:11248969)] (S) Msg RX from 1:15EE92BA64B84421 [0000] to 00000000C3743D4D --- Type 0001:01 (IM:StatusResponse) (B:42)
I: 1738254 [EM]Dropping message on inactive session that does not match an existing exchange
I: 1738296 [EM]>>> [E:40555r S:7602 M:180316086 (Ack:11248970)] (S) Msg RX from 1:15EE92BA64B84421 [0000] to 00000000C3743D4D --- Type 0000:10 (SecureChannel:StandaloneAck) (B:34)
E: 1743486 [IN]Data received on an unknown session (LSID=7602). Dropping it!
E: 1743495 [IN]Data received on an unknown session (LSID=7602). Dropping it!
E: 1748496 [IN]Data received on an unknown session (LSID=7602). Dropping it!
E: 1758495 [IN]Data received on an unknown session (LSID=7602). Dropping it!

One Fabric info is erased and  the 2nd one is not.

We have the code to read the fabrics stored in the lock, see below:

[3871513621] No of fabrics that lock has joined: 1
[3871522349] ---------------------------------
[3871526923] Fabric Index : 2
[3871529880] Fabric ID    : 0x0000000000000002
[3871534454] Node ID      : 0x00000000149A3293
[3871539029] Vendor ID    : 0x1384
[3871542460] Fabric Label : 

In Summary Fabric Index 2 is not removed. if we try to commission again, we get the error I: Matter service BLE advertising not started - device is already commissioned.

we do have code to remove the Fabric but  we want the Fabric info to be removed automatically  by the stack. 

Please let us know.

Thanks.

[SubuMuthu]

Probing  this further, when the above happens, the door lock (Thread) end device is still connected to Thread network although Apple home has removed  the door lock. Using dns-sd, I can discover the device in the IP network for the node ID 0x00000000149A3293 and I can ping the end device. Thanks.