Caused by: java.lang.NoClassDefFoundError: com/carrotsearch/hppc/BitMixer

Hi All,
Recently I upgraded my ES to 2.2.1. But I am getting below exception when I try to connect using java client. Did anyone come across same scenario?

 Caused by: java.lang.NoClassDefFoundError: com/carrotsearch/hppc/BitMixer
at org.elasticsearch.common.recycler.Recyclers$4.slot(Recyclers.java:176) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.common.recycler.Recyclers$4.getDelegate(Recyclers.java:185) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.common.recycler.FilterRecycler.obtain(FilterRecycler.java:39) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.cache.recycler.PageCacheRecycler.bytePage(PageCacheRecycler.java:150) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.common.util.BigArrays.newByteArray(BigArrays.java:453) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.common.util.BigArrays.newByteArray(BigArrays.java:466) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.common.io.stream.BytesStreamOutput.<init>(BytesStreamOutput.java:60) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.common.io.stream.ReleasableBytesStreamOutput.<init>(ReleasableBytesStreamOutput.java:36) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.transport.netty.NettyTransport.sendRequest(NettyTransport.java:792) [elasticsearch-2.1.1.jar:2.1.1]
at org.elasticsearch.transport.TransportService.sendRequest(TransportService.java:312) [elasticsearch-2.1.1.jar:2.1.1]