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java.lang.NullPointerException at org.bson.codecs.configuration.ProvidersCodecRegistry.get(ProvidersCodecRegistry.java:53) at org.bson.codecs.configuration.ProvidersCodecRegistry.get(ProvidersCodecRegistry.java:37) at com.mongodb.connection.RequestMessage.getCodec(RequestMessage.java:245) at com.mongodb.connection.RequestMessage.addDocument(RequestMessage.java:205) at com.mongodb.connection.CommandMessage.encodeMessageBodyWithMetadata(CommandMessage.java:75) at com.mongodb.connection.RequestMessage.encodeWithMetadata(RequestMessage.java:160) at com.mongodb.connection.RequestMessage.encode(RequestMessage.java:147) at com.mongodb.connection.CommandHelper.sendMessage(CommandHelper.java:88) at com.mongodb.connection.CommandHelper.executeCommand(CommandHelper.java:32) at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.lookupServerDescription(DefaultServerMonitor.java:187) at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:135) at java.lang.Thread.run(Thread.java:745)