Can't open a file using LittleFS while in the loop()

Description:

Hi all,
I am using ESP32 Dev Module and I am trying to open a file using LittleFS library in the loop() method, but my ESP32 board always restarts and throws Guru Meditation Error.
If I am opening the same file the same way in setup() method it opens the file without any problem and I can read it and write to it.
Would someone kindly tell to me what is going on or what I am doing wrong? How can I achieve this in the loop() method?
The module actually crashes when executing this line of code:

File file = LITTLEFS.open(filename);

Sketch:


#include <Arduino.h>
#include <ArduinoJson.h>
#include <LITTLEFS.h>

// Create Task handle objects
TaskHandle_t Core0_Task0;
TaskHandle_t Core1_Task0;

void listAllFiles() {
  // List all available files (if any) in the SPI Flash File System
  File root = LITTLEFS.open("/");
  File file = root.openNextFile();
  while (file) {
    Serial.print("FILE: ");
    Serial.println(file.name());
    file = root.openNextFile();
  }
  root.close();
  file.close();  
}

void readDataFromFile(const char* filename) {
  // Read JSON data from a file
  File file = LITTLEFS.open(filename);
  if (file) {
    // Deserialize the JSON data
    DynamicJsonDocument doc(5120);
    DeserializationError error = deserializeJson(doc, file);
    if (!error) {
      int data_str = doc["ports"][1];
      Serial.println(data_str);
    } else {
      log_v("deserializing JSON", error);
    }
  } else {
    Serial.print("Could not open file: ");
    Serial.println(filename);
  }
  file.close();  
}

void writeDataToFile(const char* filename) {
  File outfile = LITTLEFS.open(filename, FILE_WRITE);
  
  DynamicJsonDocument doc(5120);
  doc["ports"][0] = "80";
  doc["ports"][1] = 443;

  serializeJson(doc, Serial);
  if (!serializeJson(doc, outfile)) {
    Serial.println("Failed to write to LITTLEFS file.");
  } else {
    Serial.println("Success!");
  }
  outfile.close();  
}

void createTasks() {
  xTaskCreatePinnedToCore(
    primaryTask,      // Function to implement the task
    "PrimaryTask",    // Name of the task
    2000,             // Stack size in words
    NULL,             // Task input parameter
    0,                // Priority of the task
    &Core1_Task0,     // Task handle.
    1                 // Core where the task should run
  );

  xTaskCreatePinnedToCore(
    secondaryTask,    // Function to implement the task
    "SecondaryTask",  // Name of the task
    2000,             // Stack size in words
    NULL,             // Task input parameter
    0,                // Priority of the task
    &Core0_Task0,     // Task handle.
    0                 // Core where the task should run
  );
}

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(115200);
  
  /* if (!LITTLEFS.begin(true)) {
    Serial.println("LITTLEFS Mount Failed.");
  } else {
    Serial.println("LITTLEFS Mount SUCCESSFUL.");
  }

  const char* filename = "/data.json";
  writeDataToFile(filename);
  listAllFiles();  
  readDataFromFile(filename);

  LITTLEFS.end(); */
  createTasks();
}

void loop() {
  vTaskDelete(NULL);
}

void primaryTask(void * parameter) {

  bool flag = true;
  for (;;) {
   if (flag) {
      flag = false;
      if (!LITTLEFS.begin(true)) {
        Serial.println("LITTLEFS Mount Failed.");
      } else {
        Serial.println("LITTLEFS Mount SUCCESSFUL.");
        const char* filename = "/data.json";
        writeDataToFile(filename);
        listAllFiles();  
        readDataFromFile(filename);
      }
      
      LITTLEFS.end();
    }
  }
}

void secondaryTask(void * parameter) {  
  for (;;) {
    // do nothing
  }
}

Debug Messages:

This is out of my Serial monitor:

Guru Meditation Error: Core  1 panic'ed (Unhandled debug exception)
Debug exception reason: Stack canary watchpoint triggered (PrimaryTask) 
Core 1 register dump:
PC      : 0x40083780  PS      : 0x00060236  A0      : 0x3ffb8510  A1      : 0x3ffb8450  
A2      : 0x3ff000e0  A3      : 0x00000001  A4      : 0x3ffbde5c  A5      : 0x00000001  
A6      : 0x00060223  A7      : 0x00000000  A8      : 0x80082b8e  A9      : 0x3ffb84f0  
A10     : 0x00000000  A11     : 0x3ffb8c2c  A12     : 0x00000001  A13     : 0x00000001  
A14     : 0x00060220  A15     : 0x00000000  SAR     : 0x00000018  EXCCAUSE: 0x00000001  
EXCVADDR: 0x00000000  LBEG    : 0x4000c46c  LEND    : 0x4000c477  LCOUNT  : 0x00000000  

ELF file SHA256: 0000000000000000

Backtrace: 0x40083780:0x3ffb8450 0x3ffb850d:0x3ffb8530 0x40086109:0x3ffb8550 0x400ea4ca:0x3ffb8590 0x400ea592:0x3ffb85b0 0x40083b49:0x3ffb85d0 0x4008403d:0x3ffb85f0 0x400ee046:0x3ffb8660 0x400d6eec:0x3ffb8690 0x400d3be5:0x3ffb86c0 0x400d4037:0x3ffb86f0 0x400d45d5:0x3ffb8790 0x400d6a35:0x3ffb87f0 0x400d2d51:0x3ffb8840 0x400e94ad:0x3ffb8970 0x4000bcc5:0x3ffb8990 0x400dee19:0x3ffb89b0 0x400d7727:0x3ffb89d0 0x400d7c13:0x3ffb8a00 0x400d7ed9:0x3ffb8a40 0x400d73c7:0x3ffb8ac0 0x400d2509:0x3ffb8af0 0x400d2626:0x3ffb8b70 0x400862c1:0x3ffb8b90

This is the output of the Exception decoder:

PC: 0x40083780
EXCVADDR: 0x00000000

Decoding stack results
0x40086109: xQueueGenericReceive at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/queue.c line 1592
0x400ea4ca: esp_ipc_call_and_wait at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp32/ipc.c line 116
0x400ea592: esp_ipc_call at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp32/ipc.c line 123
0x40083b49: spi_flash_disable_interrupts_caches_and_other_cpu at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/spi_flash/cache_utils.c line 122
0x4008403d: spi_flash_read at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/spi_flash/flash_ops.c line 165
0x400ee046: esp_partition_read at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/spi_flash/partition.c line 242
0x400d6eec: littlefs_api_read at D:\Projects\Arduino\libraries\LittleFS_esp32\src\littlefs_api.c line 22
0x400d3be5: lfs_bd_read at D:\Projects\Arduino\libraries\LittleFS_esp32\src\lfs.c line 104
0x400d4037: lfs_dir_fetchmatch at D:\Projects\Arduino\libraries\LittleFS_esp32\src\lfs.c line 861
0x400d45d5: lfs_dir_find at D:\Projects\Arduino\libraries\LittleFS_esp32\src\lfs.c line 1245
0x400d6a35: lfs_stat at D:\Projects\Arduino\libraries\LittleFS_esp32\src\lfs.c line 3189
0x400d2d51: vfs_littlefs_stat at D:\Projects\Arduino\libraries\LittleFS_esp32\src\esp_littlefs.c line 1196
0x400e94ad: esp_vfs_stat at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/vfs/vfs.c line 492
0x400dee19: stat at ../../../.././newlib/libc/syscalls/sysstat.c line 12
0x400d7727: VFSFileImpl::VFSFileImpl(VFSImpl*, char const*, char const*) at C:\Users\franc\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6\libraries\FS\src\vfs_api.cpp line 237
0x400d7c13: std::__shared_ptr ::__shared_ptr  , VFSImpl*&, char const*, char const*&>(std::_Sp_make_shared_tag, std::allocator  const&, VFSImpl*&, char const*&&, char const*&) at c:\users\franc\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\1.22.0-97-gc752ad5-5.2.0\xtensa-esp32-elf\include\c++\5.2.0\ext/new_allocator.h line 120
0x400d7ed9: VFSImpl::open(char const*, char const*) at c:\users\franc\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\1.22.0-97-gc752ad5-5.2.0\xtensa-esp32-elf\include\c++\5.2.0\bits/shared_ptr.h line 319
0x400d73c7: fs::FS::open(char const*, char const*) at C:\Users\franc\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6\libraries\FS\src\FS.cpp line 191
0x400d2509: writeDataToFile(char const*) at D:\Projects\Arduino\sketch_jul15b/sketch_jul15b.ino line 43
0x400d2626: primaryTask(void*) at D:\Projects\Arduino\sketch_jul15b/sketch_jul15b.ino line 114
0x400862c1: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c line 143

Why is all that stuff commented out in setup()?

Just to show the an example that works in the setup()

I have found the solution to my problem by increasing the stack size of the task when pinned to core. Thanks anyway.

Regards