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https://issues.apache.org/jira/browse/IO-728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary D. Gregory closed IO-728.
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Resolution: Not A Bug
Closing, not a bug, no feedback from OP.
> MimeHeaders.setValue throws NPE when IOUtils.copy is called
> -----------------------------------------------------------
>
> Key: IO-728
> URL: https://issues.apache.org/jira/browse/IO-728
> Project: Commons IO
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.5
> Environment: Java Version: 1.8
> Spring version: 4.3.11.RELEASE
> Spring boot version: 2.0.5.RELEASE
> Jersey version: 2.16
> Reporter: Anuj PB
> Priority: Major
> Attachments: StackTrace
>
>
> I have a Spring Boot Microservice and I am using *IOUtils.copy(InputStream,
> OutputStream)* which sporadically throws NPE while setting MimeHeaders as
> shown below:
> 2021-03-18 18:14:05.081 ERROR [http-nio-80-exec-8]
> o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet
> [dispatcherServlet] threw exception2021-03-18 18:14:05.081 ERROR
> [http-nio-80-exec-8] o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service()
> for servlet [dispatcherServlet] threw exception
> java.lang.NullPointerException: null at
> org.apache.tomcat.util.http.MimeHeaders.setValue(MimeHeaders.java:318) at
> org.apache.coyote.http11.Http11Processor.prepareResponse(Http11Processor.java:1285)
> at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:374) at
> org.apache.coyote.Response.action(Response.java:206) at
> org.apache.coyote.http11.Http11OutputBuffer.doWrite(Http11OutputBuffer.java:219)
> at org.apache.coyote.Response.doWrite(Response.java:602) at
> org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:352)
> at
> org.apache.catalina.connector.OutputBuffer.flushByteBuffer(OutputBuffer.java:833)
> at org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:738)
> at
> org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:399)
> at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:377) at
> org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96)
> at
> org.springframework.security.web.util.OnCommittedResponseWrapper$SaveContextServletOutputStream.write(OnCommittedResponseWrapper.java:639)
> at
> org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:2147) at
> org.apache.commons.io.IOUtils.copy(IOUtils.java:2102) at
> org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:2123) at
> org.apache.commons.io.IOUtils.copy(IOUtils.java:2078)
> I have attached the complete stack trace in the attachment and also provided
> the environment where this appears.
> I feel that there is some issue with the Commons IO lib and would like to
> know if this can be fixed.
> My application has the following code to which the stack trace points to:
> {quote}FileInputStream fis = new FileInputStream(tempOutputFile);
> return outputStream -> \{ IOUtils._copy_(fis, outputStream); }
> ;
> {quote}
> Found the page
> [http://tomcat.10.x6.nabble.com/NullPointerException-in-MimeHeaders-td2054107.html]
> which talks about a similar problem and coincidentally we too use
> *org.apache.catalina.connector.RECYCLE_FACADES=true* system property to avoid
> reuse of request and response objects, but it isn't not working for us as
> well.
>
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