Jepon created HDFS-17952:
----------------------------
Summary: standby namenode restart,datanode failed to connect
Key: HDFS-17952
URL: https://issues.apache.org/jira/browse/HDFS-17952
Project: Hadoop HDFS
Issue Type: Bug
Components: datanode
Affects Versions: 2.9.2
Reporter: Jepon
*Environment:*
Apache Hadoop 2.9.2 setup with two Namenode nodes (NN1 as standby, NN2 as
active).
After restarting NN1, the system shows 83 DN nodes with 82 successfully
registered DN links, but one DN node fails to establish a connection with NN1,
triggering an error:
2026-07-13 18:24:12,159 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 0 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:13,159 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 1 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:14,159 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 2 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:15,160 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 3 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:16,160 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 4 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:17,160 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 5 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:18,161 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 6 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:19,161 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 7 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:20,162 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 8 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:21,162 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: bdpprd01/10.1.1.1:9000. Already tried 9 time(s); retry policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2026-07-13 18:24:22,492 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
Unexpected exception in block pool Block pool
BP-383332234-10.1.1.1-1584640173217 (Datanode Uuid
213c4874-89c5-40d5-8a61-db4dbcd0439c) service to bdpprd01/10.1.1.1:9000
java.lang.NoClassDefFoundError:
org/apache/hadoop/hdfs/protocol/UnregisteredNodeException
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:717)
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:841)
at java.lang.Thread.run(Thread.java:748)
2026-07-13 18:24:22,492 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
Ending block pool service for: Block pool BP-383332234-10.1.1.1-1584640173217
(Datanode Uuid 213c4874-89c5-40d5-8a61-db4dbcd0439c) service to
bdpprd01/10.1.1.1:9000
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
