Play mailer plugin 5.0.0 sporadic attachment error

[arun....@gmail.com]

Below is the sporadic stack trace  for attaching a file. Now the file attachment fails randomly and some times the attachment goes through fine without issue. 

We are using CompletableFuture.runAsync(() -> {}) for publishing the emails using the injected mailer client. Any help is appreciated.

Build.sbt dependency

"com.typesafe.play" %% "play-mailer" % "5.0.0"

2017-05-31 18:28:18,344 [ERROR] from application in application-akka.actor.default-dispatcher-49034 - org.apache.commons.mail.EmailException: Sending the email to the following server failed : mailrelay.org.com:25

        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)

        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

Caused by: javax.mail.MessagingException: IOException while sending message;

  nested exception is:

        java.io.FileNotFoundException: /tmp/playtemp3112763383526680968/multipartBody9095873588579429689asTemporaryFile (No such file or directory)

        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1167)

        at javax.mail.Transport.send0(Transport.java:195)

        at javax.mail.Transport.send(Transport.java:124)

        at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1411)

        ... 17 more

Caused by: java.io.FileNotFoundException: /tmp/playtemp3112763383526680968/multipartBody9095873588579429689asTemporaryFile (No such file or directory)

        at java.io.FileInputStream.open0(Native Method)

        at java.io.FileInputStream.open(FileInputStream.java:195)

        at java.io.FileInputStream.<init>(FileInputStream.java:138)

        at javax.activation.FileDataSource.getInputStream(FileDataSource.java:97)

        at javax.activation.DataHandler.writeTo(DataHandler.java:305)

        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1485)

        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:865)

        at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:462)

        at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:103)

        at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:889)

        at javax.activation.DataHandler.writeTo(DataHandler.java:317)

        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1485)

        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1773)

        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1119)

        ... 20 more 

[arun....@gmail.com]

Can someone please point to what might be causing this issue. We are observing this more often in our production system. 

[Will Sargent]

You're accessing a temporary file that was uploaded to Play: see 

/tmp/playtemp3112763383526680968/multipartBody9095873588579429689asTemporaryFile (No such file or directory)

Those files are deliberately transient and are deleted after completion, so they only exist in the completion scope.  You should use moveTo to move the file somewhere else that will not be deleted:

def upload = Action(parse.multipartFormData) { request =>

  request.body.file("picture").map { picture =>

    import java.io.File

    val filename = picture.filename

    val contentType = picture.contentType

    picture.ref.moveTo(new File(s"/tmp/picture/$filename"))

    Ok("File uploaded")

  }.getOrElse {

    Redirect(routes.Application.index).flashing(

      "error" -> "Missing file")

  }

}

See https://www.playframework.com/documentation/2.5.x/ScalaFileUpload for more details.

--

Will Sargent

Engineer, Lightbend, Inc.

will.s...@lightbend.com

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[arun....@gmail.com]

Perfect. That fixed my situation by renaming the temp file to persist to disk and later publish the e-mail.

Can you please update the Java documentation for file upload in 2.5 doc by specifying the renaming aspect. I personally used renameTo method from Java 7 File API : https://docs.oracle.com/javase/7/docs/api/java/io/File.html

https://www.playframework.com/documentation/2.5.x/JavaFileUpload

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