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在esp32开发板上测试blufi例程，发现在ble成功连接后，通过手机发送完ssid和password后，一直循环打印这两条log，wifi无法连接，不知道是什么原因导致？未对例程做任何修改。
E (60049) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (60049) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

下面为开机的log:
I (29) boot: ESP-IDF v4.2-dirty 2nd stage bootloader
I (29) boot: compile time 15:40:07
I (29) boot: chip revision: 1
I (32) boot_comm: chip revision: 1, min. bootloader chip revision: 0
I (39) boot.esp32: SPI Speed : 40MHz
I (44) boot.esp32: SPI Mode : DIO
I (48) boot.esp32: SPI Flash Size : 2MB
I (53) boot: Enabling RNG early entropy source...
I (58) boot: Partition Table:
I (62) boot: ## Label Usage Type ST Offset Length
I (69) boot: 0 nvs WiFi data 01 02 00009000 00006000
I (76) boot: 1 phy_init RF data 01 01 0000f000 00001000
I (84) boot: 2 factory factory app 00 00 00010000 00100000
I (91) boot: End of partition table
I (96) boot_comm: chip revision: 1, min. application chip revision: 0
I (103) esp_image: segment 0: paddr=0x00010020 vaddr=0x3f400020 size=0x2453c (148796) map
I (168) esp_image: segment 1: paddr=0x00034564 vaddr=0x3ffbdb60 size=0x03f78 ( 16248) load
I (175) esp_image: segment 2: paddr=0x000384e4 vaddr=0x40080000 size=0x00404 ( 1028) load
0x40080000: _WindowOverflow4 at C:/Users/liny/Desktop/esp-idf-2/components/freertos/xtensa/xtensa_vectors.S:1730

I (176) esp_image: segment 3: paddr=0x000388f0 vaddr=0x40080404 size=0x07728 ( 30504) load
I (198) esp_image: segment 4: paddr=0x00040020 vaddr=0x400d0020 size=0xa9248 (692808) map
0x400d0020: _stext at ??:?

I (462) esp_image: segment 5: paddr=0x000e9270 vaddr=0x40087b2c size=0x15e64 ( 89700) load
0x40087b2c: r_lld_pdu_rx_handler at ??:?

I (517) boot: Loaded app from partition at offset 0x10000
I (517) boot: Disabling RNG early entropy source...
I (518) cpu_start: Pro cpu up.
I (521) cpu_start: Application information:
I (526) cpu_start: Project name: blufi_demo
I (531) cpu_start: App version: v4.2-dirty
I (536) cpu_start: Compile time: May 18 2021 10:01:43
I (542) cpu_start: ELF file SHA256: d2501fc46410de51...
I (548) cpu_start: ESP-IDF: v4.2-dirty
I (554) cpu_start: Starting app cpu, entry point is 0x400818d4
0x400818d4: call_start_cpu1 at C:/Users/liny/Desktop/esp-idf-2/components/esp32/cpu_start.c:287

I (0) cpu_start: App cpu up.
I (564) heap_init: Initializing. RAM available for dynamic allocation:
I (571) heap_init: At 3FFAFF10 len 000000F0 (0 KiB): DRAM
I (577) heap_init: At 3FFB6388 len 00001C78 (7 KiB): DRAM
I (583) heap_init: At 3FFB9A20 len 00004108 (16 KiB): DRAM
I (589) heap_init: At 3FFCB280 len 00014D80 (83 KiB): DRAM
I (595) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (602) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (608) heap_init: At 4009D990 len 00002670 (9 KiB): IRAM
I (614) cpu_start: Pro cpu start user code
I (633) spi_flash: detected chip: generic
I (633) spi_flash: flash io: dio
W (633) spi_flash: Detected size(4096k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (644) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (750) wifi:wifi driver task: 3ffcf6a0, prio:23, stack:6656, core=0
I (750) system_api: Base MAC address is not set
I (750) system_api: read default base MAC address from EFUSE
I (770) wifi:wifi firmware version: 1865b55
I (770) wifi:wifi certification version: v7.0
I (770) wifi:config NVS flash: enabled
I (770) wifi:config nano formating: disabled
I (780) wifi:Init data frame dynamic rx buffer num: 32
I (780) wifi:Init management frame dynamic rx buffer num: 32
I (790) wifi:Init management short buffer num: 32
I (790) wifi:Init dynamic tx buffer num: 32
I (800) wifi:Init static rx buffer size: 1600
I (800) wifi:Init static rx buffer num: 10
I (800) wifi:Init dynamic rx buffer num: 32
I (810) wifi_init: rx ba win: 6
I (810) wifi_init: tcpip mbox: 32
I (820) wifi_init: udp mbox: 6
I (820) wifi_init: tcp mbox: 6
I (820) wifi_init: tcp tx win: 5744
I (830) wifi_init: tcp rx win: 5744
I (830) wifi_init: tcp mss: 1440
I (840) wifi_init: WiFi IRAM OP enabled
I (840) wifi_init: WiFi RX IRAM OP enabled
I (930) phy: phy_version: 4500, 0cd6843, Sep 17 2020, 15:37:07, 0, 0
I (940) wifi:mode : sta (08:3a:f2:ac:1b:e8)
I (940) BTDM_INIT: BT controller compile version [3723d5b]
I (1280) BLUFI_EXAMPLE: BD ADDR: 08:3a:f2:ac:1b:ea

I (1280) BLUFI_EXAMPLE: BLUFI VERSION 0102

I (1280) BLUFI_EXAMPLE: BLUFI init finish

I (350810) BLUFI_EXAMPLE: BLUFI ble connect

E (354550) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354550) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354560) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354560) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354580) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354580) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354590) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354590) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354600) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354600) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354620) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354620) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354630) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354630) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354650) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354650) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354660) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354660) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354670) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354670) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354690) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354690) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354700) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354700) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354720) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354720) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354730) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354730) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354740) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354740) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354760) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354760) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354770) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354770) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354790) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354790) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354800) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354800) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354820) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354820) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354830) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354830) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354840) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354840) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354860) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354860) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354870) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354870) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354890) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354890) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354900) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354900) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354910) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354910) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

E (354930) BT_L2CAP: l2ble_update_att_acl_pkt_num not found p_tcb
W (354930) BT_BTC: btc_blufi_send_encap wait to send blufi custom data

请更新一下 idf 版本到 v4.2.1，此问题在 v4.2 之后的 commit f03d5431 中已修正。

PS：以后有类似问题，请查看是否有新版本的 idf，可用来做对比测试。或者可以直接使用类似 release/v4.2 分支上最新的 commit 进行测试，从而初步判断问题是否在新版本中已解决，也请关注新版本的 release note。