1.zookeeper启动报错
错误日志 启动zookeeper报错信息如下：
java.net.NoRouteToHostException: No route to host
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:402)
at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:840)
at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:762)
2015-05-19 10:26:26,983 [myid:1] - INFO [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:FastLeaderElection@849] - Notification time out: 800
解决方法
此问题产生的主要原因是因为zookeeper集群未关闭防火墙。
执行下面命令后仍然报上面的错误：
systemctl start iptables.service
经过仔细查找后发现，CentOS 7.0默认使用的是firewall作为防火墙，需要执行如下命令关闭防火墙:
systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall开机启动
关闭各个节点防火墙后，重启zookeeper进程，就可以解决上述问题了。
2.RegionServer进程挂掉
错误日志
Caused by: java.io.IOException: Couldn't set up IO streams
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:786)
at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1521)
at org.apache.hadoop.ipc.Client.call(Client.java:1438)
... 60 more
Caused by: java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Thread.java:713)
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:779)
解决方法
/etc/security/limits.conf
/etc/security/limits.d/90-nproc.conf
* hard nproc 65536 * soft nproc 65536 * hard nofile 65536 * soft nofile 65536
3.增加thrift server的线程数
日志信息
2015-06-05 12:46:37,756 INFO [thrift-worker-6] client.AsyncProcess: #79, waiting for 72000 actions to finish 2015-06-05 12:46:37,756 INFO [thrift-worker-9] client.AsyncProcess: #79, waiting for 48908 actions to finish 2015-06-05 12:46:37,855 INFO [thrift-worker-8] client.AsyncProcess: #79, waiting for 72000 actions to finish 2015-06-05 12:46:38,198 INFO [thrift-worker-2] client.AsyncProcess: #1, waiting for 78000 actions to finish 2015-06-05 12:46:38,762 INFO [thrift-worker-13] client.AsyncProcess: #79, waiting for 72000 actions to finish 2015-06-05 12:46:39,547 INFO [thrift-worker-0] client.AsyncProcess: #17, waiting for 78000 actions to finish 2015-06-05 12:47:55,612 INFO [thrift-worker-9] client.AsyncProcess: #79, waiting for 108000 actions to finish 2015-06-05 12:47:55,912 INFO [thrift-worker-6] client.AsyncProcess: #79, waiting for 114000 actions to finish
解决方法
增加thriftServer线程数
hbase-daemon.sh start thrift –threadpool -m 200 -w 500
在hbase_home目录下的logs目录中可以看到启动日志信息如下：
INFO [main] thrift.ThriftServerRunner: starting TBoundedThreadPoolServer on /0.0.0.0:9090; min worker threads=200, max worker threads=500, max queued requests=1000
hbase-daemon.sh start thrift –threadpool -m
4. zookeeper使用内存大的问题
日志信息
- jps 查看 QuorumPeerMain 进程IP
- jmap -heap PID 查看进程使用内存情况,具体情况如下：
Attaching to process ID 6801, please wait... Debugger attached successfully. Server compiler detected. JVM version is 24.71-b01 using thread-local object allocation. Parallel GC with 18 thread(s) Heap Configuration: MinHeapFreeRatio = 0 MaxHeapFreeRatio = 100 MaxHeapSize = 32126271488 (30638.0MB) NewSize = 1310720 (1.25MB) MaxNewSize = 17592186044415 MB OldSize = 5439488 (5.1875MB) NewRatio = 2 SurvivorRatio = 8 PermSize = 21757952 (20.75MB) MaxPermSize = 85983232 (82.0MB) G1HeapRegionSize = 0 (0.0MB) Heap Usage: PS Young Generation Eden Space: capacity = 537919488 (513.0MB) used = 290495976 (277.0385513305664MB) free = 247423512 (235.9614486694336MB) 54.00361624377513% used From Space: capacity = 89128960 (85.0MB) used = 0 (0.0MB) free = 89128960 (85.0MB) 0.0% used To Space: capacity = 89128960 (85.0MB) used = 0 (0.0MB) free = 89128960 (85.0MB) 0.0% used PS Old Generation capacity = 1431306240 (1365.0MB) used = 0 (0.0MB) free = 1431306240 (1365.0MB) 0.0% used PS Perm Generation capacity = 22020096 (21.0MB) used = 9655208 (9.207923889160156MB) free = 12364888 (11.792076110839844MB) 43.847256615048366% used 3259 interned Strings occupying 265592 bytes.
解决方法
方法一：
Heap Configuration配置中我们可以看到，配置的heap内存很大，现在我们修改zkServer.sh脚本减小MaxHeapSize，具体步骤如下：
* 打开zookeeper安装目录下bin文件夹中的zkServer.sh
* 在 zkServer.sh文件的49行处加入 JVMPARAM=”-Xms1000M -Xmx1000M -Xmn512M”
* 然后修改zkServer.sh 109~110行出的内容。
修改前如下：
nohup "$JAVA" "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" /
-cp "$CLASSPATH" $JVMFLAGS $ZOOMAIN "$ZOOCFG" > "$_ZOO_DAEMON_OUT" 2>&1 < /dev/null &
修改后如下(将在49上添加的JVMPARAM参数项添加在JVMFLAGS后面)：
nohup "$JAVA" "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" /
-cp "$CLASSPATH" $JVMFLAGS $JVMPARAM $ZOOMAIN "$ZOOCFG" > "$_ZOO_DAEMON_OUT" 2>&1 < /dev/null &
- 重启zookeeper进程
- jmap -heap PID 查看修改后进程使用内存情况：
Attaching to process ID 6207, please wait... Debugger attached successfully. Server compiler detected. JVM version is 24.71-b01 using thread-local object allocation. Parallel GC with 18 thread(s) Heap Configuration: MinHeapFreeRatio = 0 MaxHeapFreeRatio = 100 MaxHeapSize = 1048576000 (1000.0MB) NewSize = 536870912 (512.0MB) MaxNewSize = 536870912 (512.0MB) OldSize = 5439488 (5.1875MB) NewRatio = 2 SurvivorRatio = 8 PermSize = 21757952 (20.75MB) MaxPermSize = 85983232 (82.0MB) G1HeapRegionSize = 0 (0.0MB) Heap Usage: PS Young Generation Eden Space: capacity = 402653184 (384.0MB) used = 104690912 (99.84103393554688MB) free = 297962272 (284.1589660644531MB) 26.000269254048664% used From Space: capacity = 67108864 (64.0MB) used = 0 (0.0MB) free = 67108864 (64.0MB) 0.0% used To Space: capacity = 67108864 (64.0MB) used = 0 (0.0MB) free = 67108864 (64.0MB) 0.0% used PS Old Generation capacity = 511705088 (488.0MB) used = 0 (0.0MB) free = 511705088 (488.0MB) 0.0% used PS Perm Generation capacity = 22020096 (21.0MB) used = 8878832 (8.467514038085938MB) free = 13141264 (12.532485961914062MB) 40.321495419456845% used 2697 interned Strings occupying 216760 bytes.
方法二：
打开 zookeeper/bin/zkEnv.sh 文件,在zkEvn.sh中49~52行处有如下内容：
if [ -f "$ZOOCFGDIR/java.env" ]
then
. "$ZOOCFGDIR/java.env"
fi
该文件已经明确说明有独立JVM内存的设置文件，路径是zookeeper/conf/java.env
安装的时候这个路径下没有有java.env文件，需要自己新建一个：
* vim java.env
* java.env文件内容如下：
#!/bin/sh # heap size MUST be modified according to cluster environment export JVMFLAGS="-Xms512m -Xmx1024m $JVMFLAGS"
- 重启zookeeper进程
- jmap -heap PID 查看修改后进程使用内存情况：
[hadoop@hadoop202 conf]$ jmap -heap 10151 Attaching to process ID 10151, please wait... Debugger attached successfully. Server compiler detected. JVM version is 24.71-b01 using thread-local object allocation. Parallel GC with 18 thread(s) Heap Configuration: MinHeapFreeRatio = 0 MaxHeapFreeRatio = 100 MaxHeapSize = 1073741824 (1024.0MB) NewSize = 1310720 (1.25MB) MaxNewSize = 17592186044415 MB OldSize = 5439488 (5.1875MB) NewRatio = 2 SurvivorRatio = 8 PermSize = 21757952 (20.75MB) MaxPermSize = 85983232 (82.0MB) G1HeapRegionSize = 0 (0.0MB) Heap Usage: PS Young Generation Eden Space: capacity = 135266304 (129.0MB) used = 43287608 (41.28227996826172MB) free = 91978696 (87.71772003173828MB) 32.00176741725715% used From Space: capacity = 22020096 (21.0MB) used = 0 (0.0MB) free = 22020096 (21.0MB) 0.0% used To Space: capacity = 22020096 (21.0MB) used = 0 (0.0MB) free = 22020096 (21.0MB) 0.0% used PS Old Generation capacity = 358088704 (341.5MB) used = 0 (0.0MB) free = 358088704 (341.5MB) 0.0% used PS Perm Generation capacity = 22020096 (21.0MB) used = 8887040 (8.475341796875MB) free = 13133056 (12.524658203125MB) 40.358770461309526% used 2699 interned Strings occupying 217008 bytes.
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/57792.html