hello @rki_  I change the hdfs file by adding some property related to kerberos and i found a new error related to SSL .   STARTUP_MSG: build = https://git-wip-us.apache.org/repos/asf/hadoop.git -r baa91f7c6bc9cb92be5982de4719c1c8af91ccff; compiled by 'root' on 2016-08-18T01:41Z STARTUP_MSG: java = 1.8.0_312 ************************************************************/ 2022-05-04 16:17:37,968 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: registered UNIX signal handlers for [TERM, HUP, INT] 2022-05-04 16:17:38,361 INFO org.apache.hadoop.security.UserGroupInformation: Login successful for user nn/nn.pfe-master@ABDOU.COM using keytab file /opt/keytabs/nn.service.keytab 2022-05-04 16:17:38,510 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties 2022-05-04 16:17:38,607 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s). 2022-05-04 16:17:38,607 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system started 2022-05-04 16:17:38,611 INFO org.apache.hadoop.hdfs.server.datanode.BlockScanner: Initialized block scanner with targetBytesPerSec 1048576 2022-05-04 16:17:38,612 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Configured hostname is dn1.pfe-master 2022-05-04 16:17:38,618 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Starting DataNode with maxLockedMemory = 0 2022-05-04 16:17:38,637 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Opened streaming server at /0.0.0.0:1055 2022-05-04 16:17:38,638 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Balancing bandwith is 1048576 bytes/s 2022-05-04 16:17:38,639 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Number threads for balancing is 5 2022-05-04 16:17:38,696 INFO org.mortbay.log: Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog 2022-05-04 16:17:38,702 INFO org.apache.hadoop.security.authentication.server.AuthenticationFilter: Unable to initialize FileSignerSecretProvider, falling back to use random secrets. 2022-05-04 16:17:38,705 INFO org.apache.hadoop.http.HttpRequestLog: Http request log for http.requests.datanode is not defined 2022-05-04 16:17:38,710 INFO org.apache.hadoop.http.HttpServer2: Added global filter 'safety' (class=org.apache.hadoop.http.HttpServer2$QuotingInputFilter) 2022-05-04 16:17:38,712 INFO org.apache.hadoop.http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context datanode 2022-05-04 16:17:38,713 INFO org.apache.hadoop.http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context static 2022-05-04 16:17:38,714 INFO org.apache.hadoop.http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context logs 2022-05-04 16:17:38,723 INFO org.apache.hadoop.http.HttpServer2: Jetty bound to port 43917 2022-05-04 16:17:38,723 INFO org.mortbay.log: jetty-6.1.26 2022-05-04 16:17:38,844 INFO org.mortbay.log: Started HttpServer2$SelectChannelConnectorWithSafeStartup@localhost:43917 2022-05-04 16:17:38,907 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Shutdown complete. 2022-05-04 16:17:38,907 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMain java.io.FileNotFoundException: /opt/jks/truststore.jks (No such file or directory) at java.io.FileInputStream.open0(Native Method) at java.io.FileInputStream.open(FileInputStream.java:195) at java.io.FileInputStream.<init>(FileInputStream.java:138) at org.apache.hadoop.security.ssl.ReloadingX509TrustManager.loadTrustManager(ReloadingX509TrustManager.java:164) at org.apache.hadoop.security.ssl.ReloadingX509TrustManager.<init>(ReloadingX509TrustManager.java:81) at org.apache.hadoop.security.ssl.FileBasedKeyStoresFactory.init(FileBasedKeyStoresFactory.java:209) at org.apache.hadoop.security.ssl.SSLFactory.init(SSLFactory.java:131) at org.apache.hadoop.hdfs.server.datanode.web.DatanodeHttpServer.<init>(DatanodeHttpServer.java:149) at org.apache.hadoop.hdfs.server.datanode.DataNode.startInfoServer(DataNode.java:760) at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1112) at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:429) at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:2374) at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:2261) at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:2308) at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2485) at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2509) 2022-05-04 16:17:38,909 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1 2022-05-04 16:17:38,910 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down DataNode at dn1.pfe-master/192.168.198.160   ... 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