CxfSerlvet OutOfMemoryError

I was working with uploading large files to my Spring application, and I encountered an OutOfMemoryError.

java.lang.OutOfMemoryError: Java heap space
        at java.util.Arrays.copyOf(Arrays.java:2271)
        at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:113)
        at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:93)
        at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:140)
        at org.apache.cxf.io.CachedOutputStream.write(CachedOutputStream.java:461)
        at org.apache.cxf.helpers.IOUtils.copy(IOUtils.java:160)
        at org.apache.cxf.helpers.IOUtils.copy(IOUtils.java:104)
        at org.apache.cxf.attachment.AttachmentDataSource.cache(AttachmentDataSource.java:52)
        at org.apache.cxf.attachment.AttachmentDeserializer.cacheStreamedAttachments(AttachmentDeserializer.java:20
8)

If you are using CxfSerlvet, it lets you define the buffer memory (attachment-memory-threshold) and the max upload size (attachment-max-size)

	<jaxrs:server address="/api">
	<jaxrs:properties>
	<entry key="org.apache.cxf.propogate.exception" value="false"/>
	<entry key="attachment-directory" value="/mnt/wundr_temp"/>
	<entry key="attachment-memory-threshold" value="404800"/>
	<entry key="attachment-max-size" value="1073741824"/>
	</jaxrs:properties>
	</jaxrs:server>

view raw cxfservlet_jaxrs_upload.xml hosted with ❤ by GitHub

If you are sure you have these set correctly, make sure the attachment-directory exists. If it does, make sure tomcat has permission to write to it.