System error

error:  RT couldn't store your session.
This may mean that that the directory '/var/cache/request-tracker3.6/session_data' isn't writable or a database table is missing or corrupt.

context: 
... 
86:  };
87:  undef $cookies{$cookiename};
88:  }
89:  else {
90:  die loc("RT couldn't store your session.") . "\n"
91:  . loc(
92:  "This may mean that that the directory '[_1]' isn't writable or a database table is missing or corrupt.",
93:  $RT::MasonSessionDir
94:  )
... 
code stack:  /usr/share/request-tracker3.6/html/Elements/SetupSessionCookie:90
/usr/share/request-tracker3.6/html/autohandler:107
raw error






























RT couldn't store your session.
This may mean that that the directory '/var/cache/request-tracker3.6/session_data' isn't writable or a database table is missing or corrupt.



Trace begun at /usr/share/perl5/HTML/Mason/Exceptions.pm line 129
HTML::Mason::Exceptions::rethrow_exception('RT couldn\'t store your session.^JThis may mean that that the directory \'/var/cache/request-tracker3.6/session_data\' isn\'t writable or a database table is missing or corrupt.^J^J') called at /usr/share/request-tracker3.6/html/Elements/SetupSessionCookie line 90
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0xa27fc8c)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1256
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1246
HTML::Mason::Request::comp(undef, undef) called at /usr/share/request-tracker3.6/html/autohandler line 107
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0xa27da00)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1251
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1246
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 460
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 460
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 412
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0xa241774)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 165
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0xa241774)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 832
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0x93507b0)', 'Apache2::RequestRec=SCALAR(0x9153328)') called at /usr/share/request-tracker3.6/libexec/webmux.pl line 123
eval {...} at /usr/share/request-tracker3.6/libexec/webmux.pl line 123
RT::Mason::handler('Apache2::RequestRec=SCALAR(0x9153328)') called at /usr/share/perl5/Apache/Session/MySQL.pm line 0
eval {...} at /usr/share/perl5/Apache/Session/MySQL.pm line 0