> On 3 Aug 2017, at 15:53, Deepak Kumar <deepakwsa@xxxxxxxxx> wrote: > > Hi, After apgrading Apache RPM packages from 2.4.12 to 2.4.25 on AIX 6.1, one apache instance is not working and error_log is getting filled with below error messages. Looks like strict HTTP header processing has bitten you. > [Wed Aug 02 23:57:17.644430 2017] [http:error] [pid 23461910:tid 4627] [client 10.140.66.12:50843] AH02429: Response header name 'P3P: policyref="/w3c/p3p.xml"' contains invalid characters, aborting request That’s presumably meant as a header P3P with value the policyref bit. Somehow the server is seeing the whole line as a header name. You should investigate and fix whatever sets the header. — Nick Kew --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx