[12-Nov-2017 17:07:56 America/New_York] Default exception handler: Error reading from database Debug: SQLState: 08S01<br>
Error Code: 232<br>
Message: [Microsoft][ODBC Driver 11 for SQL Server]Shared Memory Provider: The pipe is being closed.
<br>
SQLState: 08S01<br>
Error Code: 232<br>
Message: [Microsoft][ODBC Driver 11 for SQL Server]Communication link failure<br>

SELECT * FROM mdl_task_scheduled WHERE classname = N'\core\task\file_trash_cleanup_task'
[array (
  0 => '\\core\\task\\file_trash_cleanup_task',
)]
Error code: dmlreadexception
* line 486 of \lib\dml\moodle_database.php: dml_read_exception thrown
* line 324 of \lib\dml\sqlsrv_native_moodle_database.php: call to moodle_database->query_end()
* line 431 of \lib\dml\sqlsrv_native_moodle_database.php: call to sqlsrv_native_moodle_database->query_end()
* line 896 of \lib\dml\sqlsrv_native_moodle_database.php: call to sqlsrv_native_moodle_database->do_query()
* line 972 of \lib\dml\sqlsrv_native_moodle_database.php: call to sqlsrv_native_moodle_database->get_recordset_sql()
* line 1558 of \lib\dml\moodle_database.php: call to sqlsrv_native_moodle_database->get_records_sql()
* line 1530 of \lib\dml\moodle_database.php: call to moodle_database->get_record_sql()
* line 1509 of \lib\dml\moodle_database.php: call to moodle_database->get_record_select()
* line 630 of \lib\classes\task\manager.php: call to moodle_database->get_record()
* line 169 of \lib\cronlib.php: call to core\task\manager::scheduled_task_failed()
* line 67 of \lib\cronlib.php: call to cron_run_inner_scheduled_task()
* line 61 of \admin\cli\cron.php: call to cron_run()

[12-Nov-2017 17:07:56 America/New_York] PHP Warning:  sqlsrv_free_stmt(): supplied resource is not a valid ss_sqlsrv_stmt resource in C:\Moodle\lib\dml\sqlsrv_native_moodle_recordset.php on line 135
[12-Nov-2017 17:07:56 America/New_York] PHP Fatal error:  Uncaught coding_exception: Coding error detected, it must be fixed by a programmer: A lock was created but not released at:
C:\Moodle\lib\classes\task\manager.php on line 507

 Code should look like:

 $factory = \core\lock\lock_config::get_lock_factory('type');
 $lock = $factory->get_lock(Resource id #656);
 $lock->release();  // Locks must ALWAYS be released like this.

 in C:\Moodle\lib\classes\lock\lock.php:117
Stack trace:
#0 [internal function]: core\lock\lock->__destruct()
#1 {main}
  thrown in C:\Moodle\lib\classes\lock\lock.php on line 117
[12-Nov-2017 17:09:17 America/New_York] PHP Notice:  Undefined index: SERVER_ADDR in C:\Moodle\lib\dmllib.php on line 351
[12-Nov-2017 17:09:22 America/New_York] PHP Notice:  Undefined index: SERVER_ADDR in C:\Moodle\lib\dmllib.php on line 351