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java.lang.InternalError: 	at sun.security.ec.SunEC.initialize(Native Method)	at sun.security.ec.SunEC.access$000(SunEC.java:49)	at sun.security.ec.SunEC$1.run(SunEC.java:61)	at sun.security.ec.SunEC$1.run(SunEC.java:58)	at java.security.AccessController.doPrivileged(Native Method)	at sun.security.ec.SunEC.(SunEC.java:58)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)	at java.lang.Class.newInstance(Class.java:383)	at sun.security.jca.ProviderConfig$2.run(ProviderConfig.java:221)	at sun.security.jca.ProviderConfig$2.run(ProviderConfig.java:206)	at java.security.AccessController.doPrivileged(Native Method)	at sun.security.jca.ProviderConfig.doLoadProvider(ProviderConfig.java:206)	at sun.security.jca.ProviderConfig.getProvider(ProviderConfig.java:187)	at sun.security.jca.ProviderList.getProvider(ProviderList.java:233)	at sun.security.jca.ProviderList$ServiceList.tryGet(ProviderList.java:434)	at sun.security.jca.ProviderList$ServiceList.access$200(ProviderList.java:376)	at sun.security.jca.ProviderList$ServiceList$1.hasNext(ProviderList.java:486)	at javax.crypto.KeyGenerator.nextSpi(KeyGenerator.java:339)	at javax.crypto.KeyGenerator.(KeyGenerator.java:169)	at javax.crypto.KeyGenerator.getInstance(KeyGenerator.java:224)	at org.apache.hadoop.security.token.SecretManager.(SecretManager.java:143)	at org.apache.hadoop.hdfs.security.token.block.BlockPoolTokenSecretManager.(BlockPoolTokenSecretManager.java:36)	at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1076)	at org.apache.hadoop.hdfs.server.datanode.DataNode.(DataNode.java:411)	at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:2301)	at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:2188)	at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:2235)	at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2411)	at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2435)