Apache 502 Error Reading From Remote Server
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502 Proxy Error Fix
server received an invalid response from an upstream server up vote 24 down vote favorite 5 We are building a mass mailing sending application in Java. Mail is being send by third party SMTP. After sending 400-500 mails tomcat6 service get stopped. Below is the error. Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the the proxy server received an invalid response from an upstream server. apache reverse proxy request GET /lin/Campaignn.jsp. Reason: Error reading from remote server Additionally, a 502 Bad Gateway error was encountered while trying to use an ErrorDocument to handle the request. Apache Server at msizzler.com Port 80 But when we are sending from localhost I did not received any error. It send all the mails. Please help me to sort it out this problem. java email proxy tomcat6 share|improve this question asked Dec 5 '13 at 17:36 Ranjeet Ranjan 1332210 add a comment| 3 Answers 3 active oldest votes up vote 26 down vote The HTTP 502 "Bad Gateway" response is generated when Apache web server does not receive a valid HTTP response from the upstream server, which in this case is your Tomcat web application. Some reasons why this might happen: Tomcat may have crashed The web application did not respond in time and the request from Apache timed out The Tomcat threads are timing out A network device is blocking the request, perhaps as some sort of connection timeout or DoS attack prevention system If the problem is related to timeout settings, you may be able to resolve it by investigating the following: ProxyTimeout directive of Apache's mod
href="../mod/mod_proxy.html">mod_proxy Status:Extension ModuleIdentifier:proxy_http_module SourceFile:mod_proxy_http.c Summary This module requires the service of mod_proxy. It provides the features used for proxying HTTP and HTTPS requests. mod_proxy_http supports HTTP/0.9, HTTP/1.0 ah01102: error reading status line from remote server and HTTP/1.1. It does not provide any caching abilities. If you want to
The Proxy Server Received An Invalid Response From An Upstream Server Tomcat
set up a caching proxy, you might want to use the additional service of the mod_cache module. Thus, in
502 Proxy Error Apache Reverse Proxy
order to get the ability of handling HTTP proxy requests, mod_proxy and mod_proxy_http have to be present in the server. Warning Do not enable proxying until you have secured your server. http://stackoverflow.com/questions/20406845/proxy-error-502-the-proxy-server-received-an-invalid-response-from-an-upstream Open proxy servers are dangerous both to your network and to the Internet at large. Topics Environment Variables Request notes Directives This module provides no directives. Bugfix checklisthttpd changelogKnown issuesReport a bugSee also mod_proxy mod_proxy_connect Comments Environment Variables In addition to the configuration directives that control the behaviour of mod_proxy, there are a number of environment variables that control the HTTP protocol provider. https://httpd.apache.org/docs/2.4/mod/mod_proxy_http.html Environment variables below that don't specify specific values are enabled when set to any value. proxy-sendextracrlf Causes proxy to send an extra CR-LF newline on the end of a request. This is a workaround for a bug in some browsers. force-proxy-request-1.0 Forces the proxy to send requests to the backend as HTTP/1.0 and disables HTTP/1.1 features. proxy-nokeepalive Forces the proxy to close the backend connection after each request. proxy-chain-auth If the proxy requires authentication, it will read and consume the proxy authentication credentials sent by the client. With proxy-chain-auth it will also forward the credentials to the next proxy in the chain. This may be necessary if you have a chain of proxies that share authentication information. Security Warning: Do not set this unless you know you need it, as it forwards sensitive information! proxy-sendcl HTTP/1.0 required all HTTP requests that include a body (e.g. POST requests) to include a Content-Length header. This environment variable forces the Apache proxy to send this header to the backend server, regardless of what the Client sent to the proxy. It ensures compatibility when proxying for an HTTP/1.0 or unknown backend. However, it may require the entire request to be buff
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Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET /admin/search-indexes.action. Reason: Error reading from remote server Apache/2.2.15 (CentOS) Server at confluence.com Port 80 Cause This error message triggered when an SSL connection is configured from the browser to Apache, and Apache does a reverse proxy to your Tomcat server. Internet Explorersends the wrong host information in an SSL connection and confuses Apache VirtualHosts. In short, the server name presented is that of the reverse DNS resolution of the IP, not the one in the URL. Workaround There are three workarounds for this issue: Remove the reverse proxy Make a configuration where there's only one IP address per SSL virtual hosts/server name1 server name == 1 IP address == 1 certificate == 1 Apache Virtual Host Use a different browser References: Server Name Indication Was this helpful? Yes No Thanks for your feedback! Why was this unhelpful? It wasn't accurate It wasn't clear It wasn't relevant Submit feedback Cancel Have a question about this article? See questions about this article Powered by Confluence and Scroll Viewport Atlassian Support Ask the community Provide product feedback Contact technical support Atlassian Privacy Policy Terms of use Security Copyright © 2016 Atlassian Except where otherwise noted, content in this space is licensed under a Creative Commons Attribution 2.5 Australia License.