netty: out of memory error while uploading large files

[jknack]

File upload is 1.8GB and Netty failed with this stacktrace:

Caused by: java.lang.OutOfMemoryError: Java heap space
    at io.netty.buffer.UnpooledHeapByteBuf.copy(UnpooledHeapByteBuf.java:473) ~[netty-buffer-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.readFileUploadByteMultipart(HttpPostMultipartRequestDecoder.java:1492) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.getFileUpload(HttpPostMultipartRequestDecoder.java:902) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.decodeMultipart(HttpPostMultipartRequestDecoder.java:563) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.findMultipartDisposition(HttpPostMultipartRequestDecoder.java:804) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.decodeMultipart(HttpPostMultipartRequestDecoder.java:501) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.findMultipartDelimiter(HttpPostMultipartRequestDecoder.java:657) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.decodeMultipart(HttpPostMultipartRequestDecoder.java:488) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.parseBodyMultipart(HttpPostMultipartRequestDecoder.java:453) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.parseBody(HttpPostMultipartRequestDecoder.java:422) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.offer(HttpPostMultipartRequestDecoder.java:347) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder.<init>(HttpPostMultipartRequestDecoder.java:193) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostRequestDecoder.<init>(HttpPostRequestDecoder.java:97) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]
    at io.netty.handler.codec.http.multipart.HttpPostRequestDecoder.<init>(HttpPostRequestDecoder.java:68) ~[netty-codec-http-4.1.0.CR7.jar:4.1.0.CR7]

There is an open bug at netty too: netty/netty#3559

If your app requires large file upload a better option for now is:

• http://jooby.org/doc/undertow/ or
• http://jooby.org/doc/jetty/

[elaatifi]

This is exactly why I tried undertow :)

[jknack]

sad :(... we deploy a new app and we found this.

[danechitoaie]

Could we maybe have Undertow as default server? Or was Netty better and that's what it was chosen as default?

[jknack]

Fixed in 2.0.0