clear cache

[harsha.masannagari@webcms default]$ drush cc all
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/memcached.so' - /usr/lib64/php/modules/memcached.so: undefined symbol: php_json_decode_ex in Unknown on line 0
PHP Warning:  Module 'pgsql' already loaded in Unknown on line 0
PHP Warning:  PHP Startup: apc.shm_size now uses M/G suffixes, please update your ini files in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/memcached.so' - /usr/lib64/php/modules/memcached.so: undefined symbol: php_json_decode_ex in Unknown on line 0
PHP Warning:  Module 'pgsql' already loaded in Unknown on line 0
PHP Warning:  PHP Startup: apc.shm_size now uses M/G suffixes, please update your ini files in Unknown on line 0
chmod(): Operation not permitted MTimeProtectedFastFileStorage.php:152                                                                                                                                                                                             [warning]
chmod(): Operation not permitted MTimeProtectedFastFileStorage.php:166                                                                                                                                                                                             [warning]
exception 'UnexpectedValueException' with message 'DirectoryIterator::__construct(/var/www/html/sites/default/files/php/service_container/ServiceContainer.php): failed to open dir: Permission denied' in                                                         [error]
/var/www/html/sites/all/modules/contrib/inject/lib/Drupal/Component/PhpStorage/MTimeProtectedFastFileStorage.php:167
Stack trace:
#0 /var/www/html/sites/all/modules/contrib/inject/lib/Drupal/Component/PhpStorage/MTimeProtectedFastFileStorage.php(167): DirectoryIterator->__construct('/var/www/html/s...')
#1 /var/www/html/sites/all/modules/contrib/inject/lib/Drupal/Component/PhpStorage/MTimeProtectedFastFileStorage.php(92): Drupal\Component\PhpStorage\MTimeProtectedFastFileStorage->cleanDirectory('/var/www/html/s...')
#2 /var/www/html/sites/all/modules/contrib/inject/inject.module(257): Drupal\Component\PhpStorage\MTimeProtectedFastFileStorage->save('ServiceContaine...', '<?php??use Symf...')
#3 /var/www/html/sites/all/modules/contrib/inject/inject.module(236): inject_dump(Object(Symfony\Component\DependencyInjection\ContainerBuilder))
#4 /var/www/html/sites/all/modules/contrib/smartling/smartling.module(77): inject_exit()
#5 [internal function]: smartling_flush_caches()
#6 /var/www/html/includes/module.inc(957): call_user_func_array('smartling_flush...', Array)
#7 /var/www/html/includes/common.inc(7675): module_invoke_all('flush_caches')
#8 /usr/share/drush/commands/core/drupal/cache.inc(99): drupal_flush_all_caches()
#9 /usr/share/drush/includes/drush.inc(724): drush_cache_clear_both()
#10 /usr/share/drush/includes/drush.inc(711): drush_call_user_func_array('drush_cache_cle...', Array)
#11 /usr/share/drush/commands/core/cache.drush.inc(144): drush_op('drush_cache_cle...')
#12 [internal function]: drush_cache_command_clear('all')
#13 /usr/share/drush/includes/command.inc(422): call_user_func_array('drush_cache_com...', Array)
#14 /usr/share/drush/includes/command.inc(231): _drush_invoke_hooks(Array, Array)
#15 [internal function]: drush_command('all')
#16 /usr/share/drush/includes/command.inc(199): call_user_func_array('drush_command', Array)
#17 /usr/share/drush/lib/Drush/Boot/BaseBoot.php(67): drush_dispatch(Array)
#18 /usr/share/drush/includes/preflight.inc(66): Drush\Boot\BaseBoot->bootstrap_and_dispatch()
#19 /usr/share/drush/drush.php(12): drush_main()
#20 {main}