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java.lang.NullPointerException: null	at io.atomix.catalyst.transport.netty.NettyTls.loadKeystore(NettyTls.java:90)	at io.atomix.catalyst.transport.netty.NettyTls.initSslEngine(NettyTls.java:59)	at io.atomix.catalyst.transport.netty.NettyClient$1.initChannel(NettyClient.java:76)	at io.atomix.catalyst.transport.netty.NettyClient$1.initChannel(NettyClient.java:71)	at io.netty.channel.ChannelInitializer.channelRegistered(ChannelInitializer.java:68)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRegistered(AbstractChannelHandlerContext.java:143)	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRegistered(AbstractChannelHandlerContext.java:129)	at io.netty.channel.DefaultChannelPipeline.fireChannelRegistered(DefaultChannelPipeline.java:733)	at io.netty.channel.AbstractChannel$AbstractUnsafe.register0(AbstractChannel.java:450)	at io.netty.channel.AbstractChannel$AbstractUnsafe.access$100(AbstractChannel.java:378)	at io.netty.channel.AbstractChannel$AbstractUnsafe$1.run(AbstractChannel.java:424)	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358)	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357)	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)	at java.lang.Thread.run(Thread.java:745)