Java io ioexception 503 service unavailable

Java – Server returned HTTP response code: 503 for URL

Getting «Exception in thread «main» java.io.IOException: Server returned HTTP response code: 503 for URL» error when I make multiple calls to Amazon Product Advertising API.

Is the reason overloading of the service?
One Possible solution is to use Thread.Sleep(milliseconds) method.

But is there any other more sophisticated solution? Like proxies or something?

Here is the code used to make the connection:

URL amazon = new URL(url); URLConnection yc = amazon.openConnection(); BufferedReader in = new BufferedReader( new InputStreamReader( yc.getInputStream())); 

Best Solution

10.5.4 503 Service Unavailable

The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the delay MAY be indicated in a Retry-After header. If no Retry-After is given, the client SHOULD handle the response as it would for a 500 response. Note: The existence of the 503 status code does not imply that a server must use it when becoming overloaded. Some servers may wish to simply refuse the connection.

So yes, server overload is a likely cause. To figure out how to deal with this you probably want to discuss it with whoever operates the service, to understand what they can tolerate. Then, if you search for «throttle web requests» on SO, you’ll find a number of discussions of how to implement throttling once you know your requirement.

Now that I see you’re talking about Amazon Advertising API, a quick search got me to this page: http://docs.aws.amazon.com/AWSECommerceService/latest/DG/TroubleshootingApplications.html

The Efficiency Guidelines on that page pretty clearly state what will trigger your problem, and the request rates that are acceptable.

Related Solutions

Git – How to change the URI (URL) for a remote Git repository

git remote set-url origin new.git.url/here 

(see git help remote ) or you can edit .git/config and change the URLs there. You’re not in any danger of losing history unless you do something very silly (and if you’re worried, just make a copy of your repo, since your repo is your history.)

Java – Error is java.io.IOException: Server returned HTTP response code: 500 for URL: while invoking weservice

It is a server error response, presumably on an internal service as the given address doesn’t reside on the internet AFAIK. You must get the server logs to establish what it does not like about your request.

Related Question

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HTTP Response Code 503 Received from Server for URL

Using Selenium Htmlunit Driver, one can obtain the page source. In case of Error 503, the server is reachable, but returns an error status code. This error code indicates «Service Unavailable,» which could be due to a temporary problem on the server or rejection of the request by the server. The site using Cloudflare causes Solution 3, which insulates the application against external server downtime and reduces the W3 infrastructure load.

Server returned HTTP response code: 503 for URL

This information is available in the RFC2616 section 10, which outlines the definitions for these status codes.

10.5.4 503 Service Unavailable

The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the delay MAY be indicated in a Retry-After header. If no Retry-After is given, the client SHOULD handle the response as it would for a 500 response. Note: The existence of the 503 status code does not imply that a server must use it when becoming overloaded. Some servers may wish to simply refuse the connection.

It is highly possible that the server overload is the reason behind the issue. To address this problem, it is recommended to consult with the service provider to determine their capacity. Once you have identified their capabilities, you can search for «throttle web requests» on SO to find various discussions on how to implement throttling based on your specific needs.

Upon realizing that the topic of discussion is the Amazon Advertising API, I conducted a swift search and stumbled upon the following webpage: http://docs.aws.amazon.com/AWSECommerceService/latest/DG/TroubleshootingApplications.html.

The guidelines for efficiency mentioned on that page clearly outline the factors that may cause your issue, along with the request rates that are deemed appropriate.

The status code 503 for HTTP indicates that the service requested is not available.

There is a possibility that the server is undergoing maintenance and may not be available at the moment.

If you encounter an error while trying to access a service , it is advisable to reach out to the service owner to determine the cause.

As the service owner, reviewing the log for errors can help identify the issue.

In case you encounter this error while establishing multiple connections to the service through the client class, it is crucial to reflect on the rationale behind the need to create numerous connections.

Server returned HTTP response code: 503 for URL, HTTP 503 means Requested Service is Unavailable. It might be due to, 1) Server might be busy. 2) Server might be down for maintenance. If you are accessing a service and getting this error, then try to contact the service owner to find out what’s going on. If you are the owner of the service, then check the errors in the …

Server returned HTTP response code 503 for URL

Enabling Javascript is necessary to retrieve data from the website. Without it, no data can be obtained.

One option is to utilize tools that mimic browser actions. For instance, the Selenium Htmlunit Driver can be utilized to obtain the page source.

 HtmlUnitDriver drv = new HtmlUnitDriver(BrowserVersion.FIREFOX_38); drv.setJavascriptEnabled(true); drv.get("http://kissmanga.com/"); drv.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS); System.out.println(drv.getPageSource()); 

Error 503 indicates that the server is accessible, but has produced an error status code.

503 is for «Service Unavailable»

It’s possible that there was a temporary issue with the server or that your request was rejected by the server for some reason.

The reason behind the site showing ‘please wait while we check your browser’ message is that it seems to be employing Cloudflare technology.

503 = HTTP 503 Service Unavailable

Cloudflare requests that you wait momentarily while it verifies that you are not a victim of a DDoS attack.

To handle redirects, your parser should be programmed to either wait for it to complete or manually navigate to the redirected page.

Server returned HTTP response code 503 for URL, 503 = HTTP 503 Service Unavailable. This is Cloudflare telling you to hang on while it makes sure you aren’t a DDOS. You will need to code your parser to review the body and either wait out the redirect, or visit it manually yourself. Share. answered Nov 21, 2015 at 16:17.

Java.io.IOException: Server returned HTTP response code: 503 for URL: http://www.w3.org/TR/html4/strict.dtd

The issue arose due to the unavailability of the W3 server, whereby the HTTP response code of 503 indicates that the service was not accessible.

In your solution, you have instructed the DOM parser to avoid retrieving external DTDs. As a result, validation against any DTDs that your application cannot locate locally is disabled. Moreover, it appears that your DOM is not populated with default attribute values as a consequence of this action.

To ensure your application is not affected by external server downtime and to reduce the load on the W3 infrastructure, it is recommended to obtain duplicates of any external DTDs that your application might use and incorporate them into your application or keep them in a permanent local cache.

An option to consider is adjusting your application settings to make use of a web proxy for caching.

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false); Document doc = factory.newDocumentBuilder().parse(new InputSource(new StringReader(html.toString()))); 

Java.io.IOException: Server returned HTTP response, The problem was that the W3 server was down at the time. An HTTP response code of 503 means «Service Unavailable». What you have done in your solution is to tell the DOM parser not to try to fetch external DTDs. This effectively disables validation against any DTDs that your application cannot find locally.

Server returned HTTP response code 503

The solution has been identified and you have the option to select either option 1 or option 2.

1. Get gradle by downloading it via http://services.gradle.org/distributions/gradle-2.2.1-all.zip, and transfer it to App\platforms\android\gradle. Then, modify build.js in App\platforms\android\cordova\lib and update the variable distributionUrl from ‘distributionUrl=http\://services.gradle.org/distributions/gradle-2.2.1-all.zip’ to ‘distributionUrl=../gradle-2.2.1-all.zip’.
2. Modify the variable distributionUrl by removing the redundancy ‘distributionUrl=’ and leaving the URL intact as ‘http://services.gradle.org/distributions/gradle-2.2.1-all.zip’.

Java.io.IOException: Server returned HTTP response, In the following code: private Document transformDoc(Source source) throws TransformerException, IOException < TransformerFactory factory = TransformerFactory.newInstance(); Transformer

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HTTP Response : 503

posted 19 years ago

Hello,
I connect to an external website from my web application using HttpURLConnection. The connection is successful but when I try to get the input stream using the getInputStream() method of HttpURLConnection, I get this error :

My approach to solve this problem involved 3 steps.
1. I tried typing the url directly from the browser and I get a proper response which is actually an xml stream. So there is nothing wrong in the url or the website I am trying to connect to.
2. I also wrote a test java class to test the connection and get the inputstream, it worked fine. So I thought that there is something wrong in my servlet based web application.
3. I restarted my server and then it started working fine.
Well, I have solved my problem but I want to know what exactly went wrong in my server. It was working fine for around 3 months, I never restarted my server during this period, but then I had to restart my server now to solve the above mentioned problem.
Any pointers?
Regards.
[ March 21, 2004: Message edited by: shankar vembu ]

posted 19 years ago

This is the explanation given in w3.org for 503 response code

10.5.4 503 Service Unavailable
The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the delay MAY be indicated in a Retry-After header. If no Retry-After is given, the client SHOULD handle the response as it would for a 500 response.

Note: The existence of the 503 status code does not imply that a
server must use it when becoming overloaded. Some servers may wish
to simply refuse the connection.

posted 19 years ago

Originally posted by Karthik Prabu:
This is the explanation given in w3.org for 503 response code

10.5.4 503 Service Unavailable
The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the delay MAY be indicated in a Retry-After header. If no Retry-After is given, the client SHOULD handle the response as it would for a 500 response.

Note: The existence of the 503 status code does not imply that a
server must use it when becoming overloaded. Some servers may wish
to simply refuse the connection.

thanks for the response, karthik.
I am aware of the reason behind this status code. But as I mentioned in my approach to solve the problem #1, I tried to connect to the service directly from the browser and I got the XML response. Meaning, that this is not an issue of the unavailability of the service, I am trying to connect to. So whose fault is it anyway, my tomcat server ?
Regards.
[ April 02, 2008: Message edited by: Ulf Dittmer ]

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