Getting "empty text" and "invalid version format" exceptions

Elastic Stack Elasticsearch
2

Here are the logs

/var/log/elasticsearch/elasticsearch.log

[2016-06-10 10:15:50,295][WARN ][http.netty               ] [John Doe] Caught exception while handling client http traffic, closing connection [id: 0x24afc07
f, /10.13.37.35:46630 => /10.13.37.99:9200]
java.lang.IllegalArgumentException: invalid version format: ﾍ^V{ﾡESCﾥ;A￮(Bￄￅ^ﾹﾅ^Gﾢﾍ%ﾰNￕ<^Pﾹ!ﾁ   ￅﾹ^ZￎYBYF?ﾳﾬﾓ￪<U+FFD0>H.�ﾦ<U+FFFE>ﾛﾮ7�I<U+FFC8>ￃ￩ﾝA)ﾖￅN_ﾸﾴﾜPￋ
Zﾱ%U<U+FFFF>^N^@^@<U+FFFF><U+FFFF>B(Fﾉ2W^@^@^@^A2C^@^@^@￮X^|ﾏﾻJ￬0^Pﾆ}<U+FFDE>ￄLMￋﾒﾵ<U+FFDE>=ﾫJﾛ^T  ﾤKﾕ&(<U+FFF2>Xￗﾠﾋ<U+FFD1>%ﾰ^X<U+FFBF>{ￆI^U^Hﾁ)$<U+FFFE>_ﾟﾾ
￩ﾟﾪﾪ<U+FFFA>G<U+FFF3>ﾰￂￅAￖﾣￎ^Zￔ
        at org.jboss.netty.handler.codec.http.HttpVersion.<init>(HttpVersion.java:94)
        at org.jboss.netty.handler.codec.http.HttpVersion.valueOf(HttpVersion.java:62)
        at org.jboss.netty.handler.codec.http.HttpRequestDecoder.createMessage(HttpRequestDecoder.java:75)
        at org.jboss.netty.handler.codec.http.HttpMessageDecoder.decode(HttpMessageDecoder.java:191)
        at org.jboss.netty.handler.codec.http.HttpMessageDecoder.decode(HttpMessageDecoder.java:102)
        at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:500)
        at org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:485)
        at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
        at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
       ...
        at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
        at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
        at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
        at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
        at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
        at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
        at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
        at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
        at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
        at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
[2016-06-10 10:14:59,454][WARN ][http.netty               ] [John Doe] Caught exception while handling client http traffic, closing connection [id: 0xdbd98da3, /10.13.37.28:34468 => /10.13.37.99:9200]
java.lang.IllegalArgumentException: invalid version format: <U+FFC8>ﾸXￎ9ﾖￜﾉBEﾥￊE*ﾊ￢7ﾮZ^WG31ﾱﾓ^^^Yￒ1^O&ﾎﾀ<U+FFD0>3      ￣ﾢEﾠ
        at org.jboss.netty.handler.codec.http.HttpVersion.<init>(HttpVersion.java:94)
        at org.jboss.netty.handler.codec.http.HttpVersion.valueOf(HttpVersion.java:62)
        at org.jboss.netty.handler.codec.http.HttpRequestDecoder.createMessage(HttpRequestDecoder.java:75)
        at org.jboss.netty.handler.codec.http.HttpMessageDecoder.decode(HttpMessageDecoder.java:191)
        at org.jboss.netty.handler.codec.http.HttpMessageDecoder.decode(HttpMessageDecoder.java:102)
        at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:500)
 ...
        at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
        at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
        at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
        at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
        at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
        at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
        at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
        at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
        at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
        at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
        at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)