Smack 4.4.3 - Sending file via OutgoingFileTransfer.sendFile() throws IllegalArgumentException: Not supported: indent-number

Smack Smack Support
1

Encountered the following Exception when trying to sendFile in android aTalk. Not sure why this happen.

2021-08-16 10:15:22.282 13850-22517/org.atalk.android I/aTalk: [164566] org.jivesoftware.smack.util.XmlUtil.<clinit>() XML TransformerFactory does not support indent-number attribute
    java.lang.IllegalArgumentException: Not supported: indent-number
        at org.apache.xalan.processor.TransformerFactoryImpl.setAttribute(TransformerFactoryImpl.java:580)
        at org.jivesoftware.smack.util.XmlUtil.<clinit>(XmlUtil.java:39)
        at org.jivesoftware.smack.util.XmlUtil.isClarkNotation(XmlUtil.java:69)
        at org.jivesoftware.smackx.formtypes.FormFieldRegistry.register(FormFieldRegistry.java:75)
        at org.jivesoftware.smackx.formtypes.FormFieldRegistry.register(FormFieldRegistry.java:66)
        at org.jivesoftware.smackx.xdata.packet.DataForm.<init>(DataForm.java:112)
        at org.jivesoftware.smackx.xdata.packet.DataForm.<init>(DataForm.java:54)
        at org.jivesoftware.smackx.xdata.packet.DataForm$Builder.build(DataForm.java:561)
        at org.jivesoftware.smackx.filetransfer.FileTransferNegotiator.createDefaultInitiationForm(FileTransferNegotiator.java:375)
        at org.jivesoftware.smackx.filetransfer.FileTransferNegotiator.negotiateOutgoingTransfer(FileTransferNegotiator.java:315)
        at org.jivesoftware.smackx.filetransfer.OutgoingFileTransfer.negotiateStream(OutgoingFileTransfer.java:372)
        at org.jivesoftware.smackx.filetransfer.OutgoingFileTransfer.access$100(OutgoingFileTransfer.java:44)
        at org.jivesoftware.smackx.filetransfer.OutgoingFileTransfer$2.run(OutgoingFileTransfer.java:232)
        at java.lang.Thread.run(Thread.java:923)
2021-08-16 10:15:22.325 13850-18402/org.atalk.android D/SMACK: SENT (0): 
    <iq to='peacock@atalk.sytes.net/atalk' id='141XK-47' type='set'>
      <si xmlns='http://jabber.org/protocol/si' id='jsi_1646557298' mime-type='image/jpeg' profile='http://jabber.org/protocol/si/profile/file-transfer'>
        <file xmlns="http://jabber.org/protocol/si/profile/file-transfer" name="downports.jpg" size="27446" >
          <desc>
            Sending file
          </desc>
        </file>
        <feature xmlns="http://jabber.org/protocol/feature-neg">
          <x xmlns='jabber:x:data' type='form'>
            <field var='stream-method' type='list-single'>
              <option>
                <value>
                  http://jabber.org/protocol/bytestreams
                </value>
              </option>
              <option>
                <value>
                  http://jabber.org/protocol/ibb
                </value>
              </option>
            </field>
          </x>
        </feature>
      </si>
    </iq>
2

That’s a non-fatal exception, which is also denoted by the log level of Info (see the I/ in the log string) that is logged once upon initialization of Smack’s XmlUtil class. See

As you see from the stack trace, this class is initialized because FormFieldRegistry calls XmlUtil.isClarkNotation().

3

Thanks for clarification. Will just ignore the Exception in aTalk.

4

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