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https://reviews.apache.org/r/59394/
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Review request for Ambari and Vitalyi Brodetskyi.
Bugs: AMBARI-21070
https://issues.apache.org/jira/browse/AMBARI-21070
Repository: ambari
Description
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Race condition: webhdfs call mkdir /tmp/druid-indexing before /tmp making tmp
not writable.
@HDP install through ambari , just at the step start components on host< > we
have some webhdfs operations in background which is creating HDFS directory
structures required for specific components like (/tmp, /tmp/hive /user/druid
/tmp/druid-indexing ...)
generally the expected order is getfileInfo : /tmp --> mkdir: /tmp
changePermission: /tmp to 777 (hdfs:hdfs) so that /tmp is accessible to all ,
hence hivemetastore able to create /tmp/hive(hive scratch directory)
But here in this case specific to druid install , most of the times mkdir of
/tmp/druid-indexing called before(actual /tmp creation) and thus /tmp is
having just default directory permission(755).
->So next call of getfileInfo : /tmp says already exist it will not further
create and change permission
This made /tmp not accessible to write, So HiveServer process gets shutdown as
it unable to create/access /tmp/hive.
hdfs-audit log:
2017-05-12 06:39:51,067 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.26.3 cmd=getfileinfo src=/tmp/druid-indexing dst=null
perm=null proto=webhdfs
2017-05-12 06:39:51,120 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.22.81 cmd=contentSummary src=/user/druid
dst=null perm=null proto=webhdfs
2017-05-12 06:39:51,133 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.37.200 cmd=setPermission src=/ats/active
dst=null perm=hdfs:hadoop:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,155 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.26.3 cmd=mkdirs src=/tmp/druid-indexing dst=null
perm=hdfs:hdfs:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,206 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.22.81 cmd=listStatus src=/user/druid dst=null
perm=null proto=webhdfs
2017-05-12 06:39:51,235 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.37.200 cmd=setPermission src=/ats/
dst=null perm=yarn:hadoop:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,249 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.26.3 cmd=setPermission src=/tmp/druid-indexing
dst=null perm=hdfs:hdfs:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,290 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.22.81 cmd=listStatus src=/user/druid/data
dst=null perm=null proto=webhdfs
2017-05-12 06:39:51,339 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.37.200 cmd=setPermission src=/ats/active/
dst=null perm=hdfs:hadoop:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,341 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.26.3 cmd=setOwner src=/tmp/druid-indexing dst=null
perm=druid:hdfs:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,380 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.22.81 cmd=setOwner src=/user/druid/data
dst=null perm=druid:hdfs:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,431 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.37.200 cmd=setOwner src=/ats/active dst=null
perm=yarn:hadoop:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,526 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.37.200 cmd=setOwner src=/ats/ dst=null
perm=yarn:hadoop:rwxr-xr-x proto=webhdfs
2017-05-12 06:39:51,580 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.32.12 cmd=getfileinfo src=/apps/hbase/staging
dst=null perm=null proto=webhdfs
2017-05-12 06:39:51,620 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.37.200 cmd=setOwner src=/ats/active/
dst=null perm=yarn:hadoop:rwxr-xr-x proto=webhdfs
....
2017-05-12 06:39:53,289 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:SIMPLE) ip=/172.27.26.202 cmd=getfileinfo src=/tmp dst=null
perm=null proto=webhdfs
We can see in the log accessing /tmp/druid-indexing at 06:39:51(hence
/tmp/have just 755 permission as per call), and accessing /tmp(getfileinfo) at
06:39:53, which returns /tmp already existing.
HiveServer2 goes down with AccessControlException: Permission denied:
user=hive, access=WRITE, inode="/tmp/hive":hdfs:hdfs:drwxr-xr-x (as /tmp/hive
itself could not be created)
java.lang.RuntimeException: Error applying authorization policy on hive
configuration: org.apache.hadoop.security.AccessControlException: Permission
denied: user=hive, access=WRITE, inode="/tmp/hive":hdfs:hdfs:drwxr-xr-x
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:319)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:292)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:213)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:190)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1955)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1939)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkAncestorAccess(FSDirectory.java:1922)
at
org.apache.hadoop.hdfs.server.namenode.FSDirMkdirOp.mkdirs(FSDirMkdirOp.java:71)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:4150)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:1109)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:633)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:640)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2351)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2347)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1866)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2345)
[root@ctr-e133-1493418528701-32069-01-000002 hive]# hadoop fs -ls /
Found 8 items
drwxrwxrwx - yarn hadoop 0 2017-05-12 06:42 /app-logs
drwxr-xr-x - hdfs hdfs 0 2017-05-12 06:41 /apps
drwxr-xr-x - yarn hadoop 0 2017-05-12 06:39 /ats
drwxr-xr-x - hdfs hdfs 0 2017-05-12 06:40 /hdp
drwxr-xr-x - mapred hdfs 0 2017-05-12 06:40 /mapred
drwxrwxrwx - mapred hadoop 0 2017-05-12 06:40 /mr-history
drwxr-xr-x - hdfs hdfs 0 2017-05-12 06:40 /tmp
drwxr-xr-x - hdfs hdfs 0 2017-05-12 07:17 /user
[root@ctr-e133-1493418528701-32069-01-000002 hive]# hadoop fs -ls /tmp
Found 2 items
drwxr-xr-x - druid hdfs 0 2017-05-12 07:50 /tmp/druid-indexing
drwxr-xr-x - hdfs hdfs 0 2017-05-12 06:40
/tmp/entity-file-history
On a Cluster which passed on creating /tmp and giving proper permissions looks
like below(These have no druid installed)
2017-05-18 00:25:18,092 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:KERBEROS) ip=/172.27.25.65 cmd=getfileinfo src=/tmp
dst=null perm=null proto=webhdfs
2017-05-18 00:25:18,195 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:KERBEROS) ip=/172.27.25.65 cmd=mkdirs src=/tmp
dst=null perm=hdfs:hdfs:rwxr-xr-x proto=webhdfs
2017-05-18 00:25:18,290 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:KERBEROS) ip=/172.27.25.65 cmd=setPermission src=/tmp
dst=null perm=hdfs:hdfs:rwxrwxrwx proto=webhdfs
2017-05-18 00:25:18,385 INFO FSNamesystem.audit: allowed=true ugi=hdfs
(auth:KERBEROS) ip=/172.27.25.65 cmd=setOwner src=/tmp
dst=null perm=hdfs:hdfs:rwxrwxrwx proto=webhdfs
Diffs
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ambari-server/src/main/resources/common-services/DRUID/0.9.2/package/scripts/druid.py
18febeb
ambari-server/src/main/resources/common-services/DRUID/0.9.2/package/scripts/params.py
b1d9472
ambari-server/src/test/python/stacks/2.6/DRUID/test_druid.py f35fd8e
ambari-server/src/test/python/stacks/2.6/configs/default.json 54000e6
Diff: https://reviews.apache.org/r/59394/diff/1/
Testing
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mvn clean test
Thanks,
Andrew Onischuk
