zookeeper错误

ZooKeeper JMX enabled by default
Using config: /data4/hadoop/zookeeper-3.4.8/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.

java.io.FileNotFoundException: /data4/hadoop/zookeeper-3.4.8/data/version-2/currentEpoch.tmp (权限不够)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
at java.io.FileOutputStream.<init>(FileOutputStream.java:171)
at org.apache.zookeeper.common.AtomicFileOutputStream.<init>(AtomicFileOutputStream.java:59)
at org.apache.zookeeper.server.quorum.QuorumPeer.writeLongToFile(QuorumPeer.java:1243)
at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:536)
at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:500)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:153)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:111)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
2016-08-25 18:11:50,106 [myid:0] - ERROR [main:QuorumPeerMain@89] - Unexpected exception, exiting abnormally
java.lang.RuntimeException: Unable to run quorum server
at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:558)
at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:500)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:153)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:111)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
Caused by: java.io.FileNotFoundException: /data4/hadoop/zookeeper-3.4.8/data/version-2/currentEpoch.tmp (权限不够)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
at java.io.FileOutputStream.<init>(FileOutputStream.java:171)
at org.apache.zookeeper.common.AtomicFileOutputStream.<init>(AtomicFileOutputStream.java:59)
at org.apache.zookeeper.server.quorum.QuorumPeer.writeLongToFile(QuorumPeer.java:1243)
at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:536)

 zkServer.sh start-foreground