Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. Now I have written a Web application which calls the rest service to get the file ,on the client web app side I receive a Out Of memory Exception. Below is my code. I receive out of memory exception at 7 line ,I guess i will have to buffer and get in parts ,but dont know how can i get this file from the server ,the size of the file is around to MB.
Can anyone please assist. Here is how I do it. Based on hints from this Spring Jira issue. Note that you cannot simply return the InputStream from the extractor, because by the time the execute method returns, the underlying connection and stream are already closed.
Spring 5 introduced the WebClient class which allows asynchronous e. From the doc:. For the moment, I'm sticking with RestTemplate because I don't want to pull in another dependency only to get access to WebClient. As bernie mentioned you can use WebClient to achieve this:. During this presentation, Rossen Stoyanchev mentioned that they thought about deprecating RestTemplate , but they have decided to postpone it after all, but it may still happen in the future!
The main disadvantage of using WebClient so far it's a quite steep learning curve reactive programming , but I think there is no way to avoid in the future, so better to take a look on it sooner than latter. This value must a multiple of greater than 2 MB. Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes.
The default value is chosen at runtime based on system configuration. For server deployments, -Xms and -Xmx are often set to the same value. Probably the problem you have is not strictly related to the request you are trying to execute download large file but the memory allocated for the process is not enough.
A better version of above correct answer could be the below code. This method will send download request to another application or service acting as actual source of truth for downloaded information. You should use multipart file attachment, so the file stream isn't load into memory. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 6 years, 1 month ago.
Active 10 months ago. Viewed 47k times. GET, statusEntity, byte[]. Exception Stack: org. NestedServletException: Handler processing failed; nested exception is java. OutOfMemoryError: Java heap space org. OutOfMemoryError: Java heap space java. Could you post the exception stack trace , please? You need to use buffers on both ends, take a look at stackoverflow.
But on the client side I am facing issue — arpit joshi. You can take url, and write this stream directly to a file - take a look at - stackoverflow. How much ram you have on server-side? You can also change the connectionTimeout in tomcat, so this problem doesnt happen — We are Borg. Show 2 more comments. Active Oldest Votes. Option 1. Using byte array This is quite straight forward approach where we will use getForObject method to get a byte array from the remote service.
Autowired; import org. RestTemplateBuilder; import org. GetMapping; import org. RestController; import org. RequestCallback; import org. ResponseExtractor; import org. RestTemplate; import java. IOException; import java. Files; import java. Path; import java. Paths; import java. Arrays; import java. GET, entity, byte[].
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