<property> <name>dfs.datanode.handler.count</name> <value>100</value> <description>The number of server threads for the datanode.</description> </property>
1. namenode/master 192.168.10.48 http://pastebin.com/7M0zzAAc $free -m (this is value when I restart the hadoop and hbase now, not the value when it crashed) total used free shared buffers cached Mem: 15951 3819 12131 0 509 1990 -/+ buffers/cache: 1319 14631 Swap: 8191 0 8191 2. datanode/region 192.168.10.45 http://pastebin.com/FiAw1yju $free -m total used free shared buffers cached Mem: 15951 3627 12324 0 1516 641 -/+ buffers/cache: 1469 14482 Swap: 8191 8 8183 On Tue, Apr 22, 2014 at 2:29 PM, Azuryy Yu <azury...@gmail.com> wrote: > one big possible issue is that you have a high concurrent request on HDFS > or HBASE, then all Data nodes handlers are all busy, then more requests are > pending, then timeout, so you can try to increase > dfs.datanode.handler.count and dfs.namenode.handler.count in the > hdfs-site.xml, then restart the HDFS. > > another, do you have datanode, namenode, region servers JVM options? if > they are all by default, then there is also have this issue. > > > > > On Tue, Apr 22, 2014 at 2:20 PM, Li Li <fancye...@gmail.com> wrote: > >> my cluster setup: both 6 machines are virtual machine. each machine: >> 4CPU Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz 16GB memory >> 192.168.10.48 namenode/jobtracker >> 192.168.10.47 secondary namenode >> 192.168.10.45 datanode/tasktracker >> 192.168.10.46 datanode/tasktracker >> 192.168.10.49 datanode/tasktracker >> 192.168.10.50 datanode/tasktracker >> >> hdfs logs around 20:33 >> 192.168.10.48 namenode log http://pastebin.com/rwgmPEXR >> 192.168.10.45 datanode log http://pastebin.com/HBgZ8rtV (I found this >> datanode crash first) >> 192.168.10.46 datanode log http://pastebin.com/aQ2emnUi >> 192.168.10.49 datanode log http://pastebin.com/aqsWrrL1 >> 192.168.10.50 datanode log http://pastebin.com/V7C6tjpB >> >> hbase logs around 20:33 >> 192.168.10.48 master log http://pastebin.com/2ZfeYA1p >> 192.168.10.45 region log http://pastebin.com/idCF2a7Y >> 192.168.10.46 region log http://pastebin.com/WEh4dA0f >> 192.168.10.49 region log http://pastebin.com/cGtpbTLz >> 192.168.10.50 region log http://pastebin.com/bD6h5T6p(very strange, >> not log at 20:33, but have log at 20:32 and 20:34) >> >> On Tue, Apr 22, 2014 at 12:25 PM, Ted Yu <yuzhih...@gmail.com> wrote: >> > Can you post more of the data node log, around 20:33 ? >> > >> > Cheers >> > >> > >> > On Mon, Apr 21, 2014 at 8:57 PM, Li Li <fancye...@gmail.com> wrote: >> > >> >> hadoop 1.0 >> >> hbase 0.94.11 >> >> >> >> datanode log from 192.168.10.45. why it shut down itself? >> >> >> >> 2014-04-21 20:33:59,309 INFO >> >> org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock >> >> blk_-7969006819959471805_202154 received exception >> >> java.io.InterruptedIOException: Interruped while waiting for IO on >> >> channel java.nio.channels.SocketChannel[closed]. 0 millis timeout >> >> left. >> >> 2014-04-21 20:33:59,310 ERROR >> >> org.apache.hadoop.hdfs.server.datanode.DataNode: >> >> DatanodeRegistration(192.168.10.45:50010, >> >> storageID=DS-1676697306-192.168.10.45-50010-1392029190949, >> >> infoPort=50075, ipcPort=50020):DataXceiver >> >> java.io.InterruptedIOException: Interruped while waiting for IO on >> >> channel java.nio.channels.SocketChannel[closed]. 0 millis timeout >> >> left. >> >> at >> >> >> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWithTimeout.java:349) >> >> at >> >> >> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:157) >> >> at >> >> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155) >> >> at >> >> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128) >> >> at >> java.io.BufferedInputStream.read1(BufferedInputStream.java:273) >> >> at >> java.io.BufferedInputStream.read(BufferedInputStream.java:334) >> >> at java.io.DataInputStream.read(DataInputStream.java:149) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockReceiver.java:265) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(BlockReceiver.java:312) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:376) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:532) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:398) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:107) >> >> at java.lang.Thread.run(Thread.java:722) >> >> 2014-04-21 20:33:59,310 ERROR >> >> org.apache.hadoop.hdfs.server.datanode.DataNode: >> >> DatanodeRegistration(192.168.10.45:50010, >> >> storageID=DS-1676697306-192.168.10.45-50010-1392029190949, >> >> infoPort=50075, ipcPort=50020):DataXceiver >> >> java.io.InterruptedIOException: Interruped while waiting for IO on >> >> channel java.nio.channels.SocketChannel[closed]. 466924 millis timeout >> >> left. >> >> at >> >> >> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWithTimeout.java:349) >> >> at >> >> >> org.apache.hadoop.net.SocketIOWithTimeout.waitForIO(SocketIOWithTimeout.java:245) >> >> at >> >> >> org.apache.hadoop.net.SocketOutputStream.waitForWritable(SocketOutputStream.java:159) >> >> at >> >> >> org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:198) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.BlockSender.sendChunks(BlockSender.java:350) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:436) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:197) >> >> at >> >> >> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:99) >> >> at java.lang.Thread.run(Thread.java:722) >> >> 2014-04-21 20:34:00,291 INFO >> >> org.apache.hadoop.hdfs.server.datanode.DataNode: Waiting for >> >> threadgroup to exit, active threads is 0 >> >> 2014-04-21 20:34:00,404 INFO >> >> org.apache.hadoop.hdfs.server.datanode.FSDatasetAsyncDiskService: >> >> Shutting down all async disk service threads... >> >> 2014-04-21 20:34:00,405 INFO >> >> org.apache.hadoop.hdfs.server.datanode.FSDatasetAsyncDiskService: All >> >> async disk service threads have been shut down. >> >> 2014-04-21 20:34:00,413 INFO >> >> org.apache.hadoop.hdfs.server.datanode.DataNode: Exiting Datanode >> >> 2014-04-21 20:34:00,424 INFO >> >> org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: >> >> /************************************************************ >> >> SHUTDOWN_MSG: Shutting down DataNode at app-hbase-1/192.168.10.45 >> >> ************************************************************/ >> >> >> >> On Tue, Apr 22, 2014 at 11:25 AM, Ted Yu <yuzhih...@gmail.com> wrote: >> >> > bq. one datanode failed >> >> > >> >> > Was the crash due to out of memory error ? >> >> > Can you post the tail of data node log on pastebin ? >> >> > >> >> > Giving us versions of hadoop and hbase would be helpful. >> >> > >> >> > >> >> > On Mon, Apr 21, 2014 at 7:39 PM, Li Li <fancye...@gmail.com> wrote: >> >> > >> >> >> I have a small hbase cluster with 1 namenode, 1 secondary namenode, 4 >> >> >> datanode. >> >> >> and the hbase master is on the same machine with namenode, 4 hbase >> >> >> slave on datanode machine. >> >> >> I found average requests per seconds is about 10,000. and the >> clusters >> >> >> crashed. and I found the reason is one datanode failed. >> >> >> >> >> >> the datanode configuration is about 4 cpu core and 10GB memory >> >> >> is my cluster overloaded? >> >> >> >> >> >>
