Jun 07 14:28:43  [info] $Fatal Error Details = Array
(
    [callback] => Array
        (
            [0] => CRM_Core_Error
            [1] => handle
        )

    [code] => -1
    [message] => DB Error: unknown error
    [mode] => 16
    [debug_info] =>
DELETE     g
FROM       civicrm_group_contact_cache g
WHERE      g.group_id IN ( 4, 6, 8, 37, 58, 67, 74, 75, 77, 96, 99, 102, 105, 112, 121, 122, 186, 198, 302, 339, 391, 413, 423, 453, 454, 455, 501, 520, 602, 707, 871, 874, 875, 893, 898, 913, 926, 927, 928, 929, 930, 931, 933, 934, 935, 936, 937, 938, 939, 942, 945, 947 )
 [nativecode=1205 ** Lock wait timeout exceeded; try restarting transaction]
    [type] => DB_Error
    [user_info] =>
DELETE     g
FROM       civicrm_group_contact_cache g
WHERE      g.group_id IN ( 4, 6, 8, 37, 58, 67, 74, 75, 77, 96, 99, 102, 105, 112, 121, 122, 186, 198, 302, 339, 391, 413, 423, 453, 454, 455, 501, 520, 602, 707, 871, 874, 875, 893, 898, 913, 926, 927, 928, 929, 930, 931, 933, 934, 935, 936, 937, 938, 939, 942, 945, 947 )
 [nativecode=1205 ** Lock wait timeout exceeded; try restarting transaction]
    [to_string] => [db_error: message="DB Error: unknown error" code=-1 mode=callback callback=CRM_Core_Error::handle prefix="" info="
DELETE     g
FROM       civicrm_group_contact_cache g
WHERE      g.group_id IN ( 4, 6, 8, 37, 58, 67, 74, 75, 77, 96, 99, 102, 105, 112, 121, 122, 186, 198, 302, 339, 391, 413, 423, 453, 454, 455, 501, 520, 602, 707, 871, 874, 875, 893, 898, 913, 926, 927, 928, 929, 930, 931, 933, 934, 935, 936, 937, 938, 939, 942, 945, 947 )
 [nativecode=1205 ** Lock wait timeout exceeded; try restarting transaction]"]
)


Jun 07 14:28:43  [info] $backTrace = #0 /xxxxxxxx/sites/all/modules/civicrm/CRM/Core/Error.php(229): CRM_Core_Error::backtrace("backTrace", TRUE)