Hi Team, We have spring boot application which take data or query data to HBase. When application initially start, it make a connection to zookeeper server remotely and later execute hbase query and get data according to requirement. But multiple time we get below error and application disconnected from zookeeper server.     2019-09-24 07:12:26.920 INFO 60447 --- [0.100.135:2181)] o.a.h.h.s.o.apache.zookeeper.ClientCnxn : Unable to read additional data from server sessionid 0x26c4d39814f4b8e, likely server has closed socket, closing socket connection and attempting reconnect .. 2019-09-24 07:14:48.042 INFO 60447 --- [io-8181-exec-41] com.mems.energy.GetTimeseriseCompare : org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after attempts=6, exceptions: Tue Sep 24 07:07:58 UTC 2019, null, java.net.SocketTimeoutException: callTimeout=60000, callDuration=94368: row 'abc' on table 'table1' at region region1, abc   Kindly help me to resolve it.   Regards, Vinay K ... View more

Hi Folks,   We are using HDP 2.6.5 version with HBase, oozie. We are getting "java.lang.OutOfMemoryError: unable to create new native thread" error in our logs:       2019-09-22 05:56:37,297 INFO container.ContainerImpl - Container container_e56_1565687270063_197657_01_001489 transitioned from LOCALIZING to LOCALIZED 2019-09-22 05:56:37,299 FATAL event.AsyncDispatcher - Error in dispatcher thread java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:717) at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:957) at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1378) at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainersLauncher.handle(ContainersLauncher.java:118) at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainersLauncher.handle(ContainersLauncher.java:55) at org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:184) at org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:110) at java.lang.Thread.run(Thread.java:748) 2019-09-22 05:56:37,300 INFO ipc.Server - Auth successful for appattempt_1565687270063_197657_000001 (auth:SIMPLE) 2019-09-22 05:56:37,303 FATAL yarn.YarnUncaughtExceptionHandler - Thread Thread[AsyncDispatcher event handler,5,main] threw an Error. Shutting down now... java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:717) at org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:197) at org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:110) at java.lang.Thread.run(Thread.java:748) 2019-09-22 05:56:37,308 INFO util.ExitUtil - Halt with status -1 Message: HaltException2019-09-22 05:56:37,308 INFO util.ExitUtil - Halt with status -1 Message: HaltException   I have gone through multiple links, But i didn't get valuable output. Ouput of max thread: cat /proc/sys/kernel/threads-max 902309 ulimit output: ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 451154 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 128000 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 451154 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited   Could some help me to resolve the issue?   Regards, Vinay K   ... View more

Hi Folks We have using multi hbase cluster with HDP2.5. I'm looking for create monitoring for error occurring at any regionserver or regions or hbase master. Could someone suggest? Regards Vinay K ... View more

Hi Folks Env HDP 2.6.5 We are using multi node of hbase cluster. We are facing issue sometime while fetching data from hbase 04:36:03 UTC Error ScanHBase[id=5e4b7f7b-5157d-3e3r-9834-456f5rr] Unable to fetch rows from HBase table abc due to Failed after attempts=2, exceptions: Thu may 16 04:36:02 UTC 2019, RpcRetryingCaller{globalStartTime=1557981362790,pause=100,retries=2}, java.jet.UnknownHostException: unknown host: wn1-hbase.xxxx.com Thu may 16 04:36:03 UTC 2019, RpcRetryingCaller{globalStartTime=1557981362790,pause=100,retries=2}, java.jet.UnknownHostException: unknown host: wn1-hbase.xxxx.com: org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after attempts=2,exceptions While wn1-hbase.xxxx.com node is working fine. Kindly help me to sort it out. Thankful to you in advance. Regards, Vinay K ... View more

Hi I'm planning to use hbase, where i've written code in hbase java api and running query.   Have there any way to check the executed query in logs as well the response from query in logs?     ... View more

Hi Folks Hope all are doing good.! We are using HDP 2.6.5 and we are using 20 nodes of cluster. Everyday we are getting NodeManager health issue and connection refused and sometimes Nodemanager restart itself. i got logs from nodemanager log file: SHUTDONN LOGS: 2019-04-02 22:28:20,947 INFO  monitor.ContainersMonitorImpl - Memory usage of ProcessTree 6948 for container-id container_e17_1553506205851_46103_01_000054 : 520.5 MB of 2 GB physical memory used; 3.6 GB of 4.2 GB virtual memory used 2019-04-02 22:28:20,948 WARN  monitor.ContainersMonitorImpl - org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl is i nterrupted. Exiting. 2019-04-02 22:28:21,162 INFO  launcher.ContainerLaunch - Container container_e17_1553506205851_46103_01_000055 succeeded 2019-04-02 22:28:21,660 INFO  ipc.Server - Stopping server on 8040 2019-04-02 22:28:21,661 INFO  ipc.Server - Stopping IPC Server Responder 2019-04-02 22:28:21,662 INFO  localizer.ResourceLocalizationService - Public cache exiting 2019-04-02 22:28:21,663 INFO  ipc.Server - Stopping IPC Server listener on 8040 2019-04-02 22:28:21,683 INFO  nodemanager.NodeManager - SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NodeManager at wn NodeManager connection refused and bad health: 2019-04-05 06:00:02,972 INFO  nodemanager.NodeStatusUpdaterImpl - Sending out 61 NM container statuses: [[container_e23_1554290874215_9521_01_000002, Creat eTime: 1554442308478, State: RUNNING, Capability: <memory:4096, vCores:1>, Diagnostics: , ExitStatus: -1000, Priority: 0], [container_e23_1554290874215_960 7_01_000075, CreateTime: 1554443718725, State: COMPLETE, Capability: <memory:2048, vCores:1>, Diagnostics: Container killed by the ApplicationMaster. Container killed on request. Exit code is 143 Container exited with a non-zero exit code 143. , ExitStatus: 143, Priority: 20], [container_e23_1554290874215_9607_01_000076, CreateTime: 1554443718726, State: COMPLETE, Capability: <memory:2048, vCores :1>, Diagnostics: Container killed by the ApplicationMaster. Container killed on request. Exit code is 143 Container exited with a non-zero exit code 143. Without giving any error, AM killing the containers. Could someone help me to sort out this issue? Regards, VInay K ... View more

Hi, We are using HDP 3 in our environment. we are trying to load data from Local into using LOAD DATA LOCAL INPATH but we are getting error No path found. While if we load file to HDFS and then LOAD DATA INPATH to table it is successfully. Is LOAD DATA from locally has been removed in HDP3? ... View more

Hi All, I'm trying to understand How hadoop 3 store data on HDFS by erasure encoding. As per erasure encoding, currently six built-in policies are supported: RS-3-2-1024k,RS-6-3-1024k, RS-10-4-1024k, RS-LEGACY-6-3-1024k, XOR-2-1-1024k and REPLICATION. Replication is general term which was also using in hadoop2(replicate the data 3x). How Reed Solomony RS-3-2-1024k(3 data blocks, 2 parity blocks and 1024k cell size) or RS-6-3-1-24k(6 data blocks, 3 parity blocks and 1024k cell size) store the data? Suppose we are having 3 data nodes, 2 NNs, 1 Edge node. We have to store the 1GB file(abc.txt) and Block size is 128MB. How RS-3-2-1024k, RS-6-3-1024k works? What is meaning of 6 data blocks, 1024K? Is there any specific prerequisites for number of DATANODE's required, according to policy? Will appreciable in advance to help me to understand the hadoop 3 concept. Regards, Vinay K ... View more