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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"InputStream from Socket throws NullPointerException for Unpacker","articleBody":"Version: 0.7.0-p8\n\nI'm trying to create an unpacker from a socket's input stream. It currently throws a NullPointerException \n\n```\nMessagePack msgPack = new MessagePack();\nSocket socket = new Socket(\"127.0.0.1\", 6666);\nmsgPack.newUnpacker(socket.getInputStream());\n```\n\nStack Trace\n\n```\nException in thread \"main\" java.lang.NullPointerException: input channel is null\n    at org.msgpack.core.Preconditions.checkNotNull(Preconditions.java:203)\n    at org.msgpack.core.buffer.ChannelBufferInput.\u003cinit\u003e(ChannelBufferInput.java:23)\n    at org.msgpack.core.buffer.ChannelBufferInput.\u003cinit\u003e(ChannelBufferInput.java:19)\n    at org.msgpack.core.buffer.InputStreamBufferInput.newBufferInput(InputStreamBufferInput.java:21)\n    at org.msgpack.core.MessagePack.newUnpacker(MessagePack.java:360)\n```\n\nThis happens inside `InputStreamBufferInput.newBufferInput` since the InputStream from the socket is a `FileInputStream` however It doesn't have a channel\n\n```\npublic static MessageBufferInput newBufferInput(InputStream in) {\n    checkNotNull(in, \"InputStream is null\");\n    if (in instanceof FileInputStream) {\n        return new ChannelBufferInput(((FileInputStream) in).getChannel());\n    }\n    return new InputStreamBufferInput(in);\n```\n\n   }\n\nHow should I create an unpacker from a socket?\n","author":{"url":"https://github.com/fdinoff","@type":"Person","name":"fdinoff"},"datePublished":"2015-04-27T01:25:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/217/msgpack-java/issues/217"}