I think lots of components expect to have read/write permission to a /tmp directory on HDFS.

Glad it works out!


_____________________________
From: Andy Davidson <andy@santacruzintegration.com>
Sent: Thursday, August 18, 2016 5:12 PM
Subject: Re: pyspark unable to create UDF: java.lang.RuntimeException: org.apache.hadoop.fs.FileAlreadyExistsException: Parent path is not a directory: /tmp tmp
To: Felix Cheung <felixcheung_m@hotmail.com>, user @spark <user@spark.apache.org>


NICE CATCH!!! Many thanks. 


I spent all day on this bug


The error msg report /tmp. I did not think to look on hdfs.


[ec2-user@ip-172-31-22-140 notebooks]$ hadoop fs -ls hdfs:///tmp/

Found 1 items

-rw-r--r--   3 ec2-user supergroup        418 2016-04-13 22:49 hdfs:///tmp

[ec2-user@ip-172-31-22-140 notebooks]$ 



I have no idea how hdfs:///tmp got created. I deleted it. 

This causes a bunch of exceptions. These exceptions has useful message. I was able to fix the problem as follows

hadoop fs -rmr hdfs:///tmp

Now I run the notebook. It creates hdfs:///tmp/hive but the permission are wrong

hadoop fs -chmod 777 hdfs:///tmp/hive


From: Felix Cheung <felixcheung_m@hotmail.com>
Date: Thursday, August 18, 2016 at 3:37 PM
To: Andrew Davidson <Andy@SantaCruzIntegration.com>, "user @spark" <user@spark.apache.org>
Subject: Re: pyspark unable to create UDF: java.lang.RuntimeException: org.apache.hadoop.fs.FileAlreadyExistsException: Parent path is not a directory: /tmp tmp

Do you have a file called tmp at / on HDFS?





On Thu, Aug 18, 2016 at 2:57 PM -0700, "Andy Davidson" <Andy@SantaCruzIntegration.com> wrote:

For unknown reason I can not create UDF when I run the attached notebook on my cluster. I get the following error

Py4JJavaError: An error occurred while calling None.org.apache.spark.sql.hive.HiveContext.: java.lang.RuntimeException: org.apache.hadoop.fs.FileAlreadyExistsException: Parent path is not a directory: /tmp tmp

The notebook runs fine on my Mac

In general I am able to run non UDF spark code with out any trouble

I start the notebook server as the user “ec2-user" and uses master URL 
spark://ec2-51-215-120-63.us-west-1.compute.amazonaws.com:6066


I found the following message in the notebook server log file. I have log level set to warn

16/08/18 21:38:45 WARN ObjectStore: Version information not found in metastore. hive.metastore.schema.verification is not enabled so recording the schema version 1.2.0

16/08/18 21:38:45 WARN ObjectStore: Failed to get database default, returning NoSuchObjectException



The cluster was originally created using spark-1.6.1-bin-hadoop2.6/ec2/spark-ec2


#from pyspark.sql import SQLContext, HiveContext
#sqlContext = SQLContext(sc)
#from pyspark.sql import DataFrame
#from pyspark.sql import functions
from pyspark.sql.types import StringType
from pyspark.sql.functions import udf
print("spark version: {}".format(sc.version))
import sys
print("python version: {}".format(sys.version))
spark version: 1.6.1python version: 3.4.3 (default, Apr  1 2015, 18:10:40) [GCC 4.8.2 20140120 (Red Hat 4.8.2-16)]



# functions.lower() raises
# py4j.Py4JException: Method lower([class java.lang.String]) does not exist# work around define a UDFtoLowerUDFRetType = StringType()#toLowerUDF = udf(lambda s : s.lower(), toLowerUDFRetType)toLowerUDF = udf(lambda s : s.lower(), StringType())
You must build Spark with Hive. Export 'SPARK_HIVE=true' and run build/sbt assembly
Py4JJavaErrorTraceback (most recent call last)<ipython-input-2-2e0f7c0bb4f9> in <module>()      4 toLowerUDFRetType = StringType()      5 #toLowerUDF = udf(lambda s : s.lower(), toLowerUDFRetType)----> 6 toLowerUDF = udf(lambda s : s.lower(), StringType())/root/spark/python/pyspark/sql/functions.py in udf(f, returnType)   1595     [Row(slen=5), Row(slen=3)]   1596     """-> 1597     return UserDefinedFunction(f, returnType)   1598    1599 blacklist = ['map', 'since', 'ignore_unicode_prefix']/root/spark/python/pyspark/sql/functions.py in __init__(self, func, returnType, name)   1556         self.returnType = returnType   1557         self._broadcast = None-> 1558         self._judf = self._create_judf(name)   1559    1560     def _create_judf(self, name):/root/spark/python/pyspark/sql/functions.py in _create_judf(self, name)   1567         pickled_command, broadcast_vars, env, includes = _prepare_for_python_RDD(sc, command, self)   1568         ctx = SQLContext.getOrCreate(sc)-> 1569         jdt = ctx._ssql_ctx.parseDataType(self.returnType.json())   1570         if name is None:   1571             name = f.__name__ if hasattr(f, '__name__') else f.__class__.__name__/root/spark/python/pyspark/sql/context.py in _ssql_ctx(self)    681         try:    682             if not hasattr(self, '_scala_HiveContext'):--> 683                 self._scala_HiveContext = self._get_hive_ctx()    684             return self._scala_HiveContext    685         except Py4JError as e:/root/spark/python/pyspark/sql/context.py in _get_hive_ctx(self)    690     691     def _get_hive_ctx(self):--> 692         return self._jvm.HiveContext(self._jsc.sc())    693     694     def refreshTable(self, tableName):/root/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py in __call__(self, *args)   1062         answer = self._gateway_client.send_command(command)   1063         return_value = get_return_value(-> 1064             answer, self._gateway_client, None, self._fqn)   1065    1066         for temp_arg in temp_args:/root/spark/python/pyspark/sql/utils.py in deco(*a, **kw)     43     def deco(*a, **kw):     44         try:---> 45             return f(*a, **kw)     46         except py4j.protocol.Py4JJavaError as e:     47             s = e.java_exception.toString()/root/spark/python/lib/py4j-0.9-src.zip/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name)    306                 raise Py4JJavaError(    307                     "An error occurred while calling {0}{1}{2}.\n".--> 308                     format(target_id, ".", name), value)    309             else:    310                 raise Py4JError(Py4JJavaError: An error occurred while calling None.org.apache.spark.sql.hive.HiveContext.: java.lang.RuntimeException: org.apache.hadoop.fs.FileAlreadyExistsException: Parent path is not a directory: /tmp tmp	at org.apache.hadoop.hdfs.server.namenode.FSDirectory.mkdirs(FSDirectory.java:1489)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:2979)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInt(FSNamesystem.java:2932)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:2911)	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:649)	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:417)	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:44096)	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:453)	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1002)	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1695)	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1691)	at java.security.AccessController.doPrivileged(Native Method)	at javax.security.auth.Subject.doAs(Subject.java:415)	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1689)	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)	at org.apache.spark.sql.hive.client.ClientWrapper.<init>(ClientWrapper.scala:204)	at org.apache.spark.sql.hive.client.IsolatedClientLoader.createClient(IsolatedClientLoader.scala:238)	at org.apache.spark.sql.hive.HiveContext.executionHive$lzycompute(HiveContext.scala:218)	at org.apache.spark.sql.hive.HiveContext.executionHive(HiveContext.scala:208)	at org.apache.spark.sql.hive.HiveContext.functionRegistry$lzycompute(HiveContext.scala:462)	at org.apache.spark.sql.hive.HiveContext.functionRegistry(HiveContext.scala:461)	at org.apache.spark.sql.UDFRegistration.<init>(UDFRegistration.scala:40)	at org.apache.spark.sql.SQLContext.<init>(SQLContext.scala:330)	at org.apache.spark.sql.hive.HiveContext.<init>(HiveContext.scala:90)	at org.apache.spark.sql.hive.HiveContext.<init>(HiveContext.scala:101)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)	at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:234)	at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:381)	at py4j.Gateway.invoke(Gateway.java:214)	at py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:79)	at py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:68)	at py4j.GatewayConnection.run(GatewayConnection.java:209)	at java.lang.Thread.run(Thread.java:745)Caused by: org.apache.hadoop.fs.FileAlreadyExistsException: Parent path is not a directory: /tmp tmp	at org.apache.hadoop.hdfs.server.namenode.FSDirectory.mkdirs(FSDirectory.java:1489)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:2979)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInt(FSNamesystem.java:2932)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:2911)	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:649)	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:417)	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:44096)	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:453)	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1002)	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1695)	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1691)	at java.security.AccessController.doPrivileged(Native Method)	at javax.security.auth.Subject.doAs(Subject.java:415)	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1689)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)	at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:90)	at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:57)	at org.apache.hadoop.hdfs.DFSClient.primitiveMkdir(DFSClient.java:2110)	at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:2079)	at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFileSystem.java:543)	at org.apache.hadoop.hive.ql.exec.Utilities.createDirsWithPermission(Utilities.java:3679)	at org.apache.hadoop.hive.ql.session.SessionState.createRootHDFSDir(SessionState.java:597)	at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:554)	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:508)	... 21 moreCaused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.fs.FileAlreadyExistsException): Parent path is not a directory: /tmp tmp	at org.apache.hadoop.hdfs.server.namenode.FSDirectory.mkdirs(FSDirectory.java:1489)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:2979)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInt(FSNamesystem.java:2932)	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:2911)	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:649)	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:417)	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:44096)	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:453)	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1002)	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1695)	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1691)	at java.security.AccessController.doPrivileged(Native Method)	at javax.security.auth.Subject.doAs(Subject.java:415)	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1689)	at org.apache.hadoop.ipc.Client.call(Client.java:1225)	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:202)	at com.sun.proxy.$Proxy21.mkdirs(Unknown Source)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:164)	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:83)	at com.sun.proxy.$Proxy21.mkdirs(Unknown Source)	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.mkdirs(ClientNamenodeProtocolTranslatorPB.java:425)	at org.apache.hadoop.hdfs.DFSClient.primitiveMkdir(DFSClient.java:2108)	... 27 more