Intermittent 502 error code on Apache http proxy

1 year ago

#357007

Thanhvanptit

I am using Redhat 7 + Apache 2.4.6 to build web proxy. The issue is 502 error appear in error log, just intermittent.

[Thu Mar 31 01:57:07.080631 2022] [proxy_http:error] [pid 4619] (70014)End of file found: [client 127.0.0.1:57198] AH01102: error reading status line from remote server x.x.x.x [Thu Mar 31 01:57:07.080668 2022] [proxy:error] [pid 4619] [client 127.0.0.1:57198] AH00898: Error reading from remote server returned by /abc/xyz/

Listen *:8083
NameVirtualHost *:8083

LogFormat "%v %h %l %u %t \"%r\" %>s %b %{MySpecialHeader}i " my_special_format
<VirtualHost *:8083>
    ProxyIOBufferSize 8192
    ServerName mytest.com
    ErrorLog logs/test_error_log
    TransferLog logs/test_access_log
    CustomLog logs/access_log_with_details my_special_format
    LogLevel warn


    SSLProxyEngine on
    SSLProxyVerify none
    SSLProxyCheckPeerCN off
    SSLProxyCheckPeerName off
    SSLProxyCheckPeerExpire off

    SetEnv force-proxy-request-1.0 1
    SetEnv proxy-nokeepalive 1
    SetEnv proxy-initial-not-pooled 1

    <Location "/test">
        SetEnv force-proxy-request-1.0 1
        SetEnv proxy-nokeepalive 1
        SetEnv proxy-initial-not-pooled 1
        ProxyPass https://test.xyz.com:8443/test timeout=30 disablereuse=Off
        ProxyPassReverse https://test.xyz.com:8443/test
    </Location>
</VirtualHost>

My upstream is an AWS NLB, from server I tried curl to upstream is ok, no problem. But when try curl to localhost:8083 502 error intermittent happen.

Any guys can please help to advise.

Thanks

apache

apache2

redhat

intermittent

http-status-code-502

0 Answers

Your Answer

Posts

Questions

Blogs

Jobs