While we tried to take comfort in the fact that we'd only seen this only
HD-based cc2.8xlarges, I'm afraid we're now seeing it when processing
larger amounts of data on SSD-based c3.4x8larges.
My two hypotheses are
1) Somehow these temp files are getting cleaned up before they're accessed
for the last time. Perhaps either something in HDFS or Hadoop cleans up
these temp directories, or perhaps there's a bunch in Crunch's planner.
2) HDFS has chosen 3 machines to replicate data to, but it is performing a
very lopsided replication. While the cluster overall looks like it has HDFS
capacity, perhaps a small subset of the machines is actually at capacity.
Things seem to fail in obscure ways when running out of disk.
2015-09-24 23:28:58,850 WARN [main]
org.apache.hadoop.mapred.YarnChild: Exception running child :
org.apache.crunch.CrunchRuntimeException: Could not read runtime node
information
at
org.apache.crunch.impl.mr.run.CrunchTaskContext.<init>(CrunchTaskContext.java:48)
at
org.apache.crunch.impl.mr.run.CrunchReducer.setup(CrunchReducer.java:40)
at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:172)
at
org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:656)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:394)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:175)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:170)
Caused by: java.io.FileNotFoundException: File does not exist:
/tmp/crunch-2031291770/p567/REDUCE
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:65)
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:55)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsUpdateTimes(FSNamesystem.java:1726)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsInt(FSNamesystem.java:1669)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1649)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1621)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getBlockLocations(NameNodeRpcServer.java:497)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getBlockLocations(ClientNamenodeProtocolServerSideTranslatorPB.java:322)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:599)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at
org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:106)
at
org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:73)
at
org.apache.hadoop.hdfs.DFSClient.callGetBlockLocations(DFSClient.java:1147)
at
org.apache.hadoop.hdfs.DFSClient.getLocatedBlocks(DFSClient.java:1135)
at
org.apache.hadoop.hdfs.DFSClient.getLocatedBlocks(DFSClient.java:1125)
at
org.apache.hadoop.hdfs.DFSInputStream.fetchLocatedBlocksAndGetLastBlockLength(DFSInputStream.java:273)
at
org.apache.hadoop.hdfs.DFSInputStream.openInfo(DFSInputStream.java:240)
at org.apache.hadoop.hdfs.DFSInputStream.<init>(DFSInputStream.java:233)
at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:1298)
at
org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:300)
at
org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:296)
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at
org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:296)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:768)
at org.apache.crunch.util.DistCache.read(DistCache.java:72)
at
org.apache.crunch.impl.mr.run.CrunchTaskContext.<init>(CrunchTaskContext.java:46)
... 9 more
Caused by: org.apache.hadoop.ipc.RemoteException(java.io.FileNotFoundException):
File does not exist: /tmp/crunch-2031291770/p567/REDUCE
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:65)
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:55)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsUpdateTimes(FSNamesystem.java:1726)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsInt(FSNamesystem.java:1669)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1649)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1621)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getBlockLocations(NameNodeRpcServer.java:497)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getBlockLocations(ClientNamenodeProtocolServerSideTranslatorPB.java:322)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:599)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007)
at org.apache.hadoop.ipc.Client.call(Client.java:1410)
at org.apache.hadoop.ipc.Client.call(Client.java:1363)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:215)
at com.sun.proxy.$Proxy13.getBlockLocations(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:190)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:103)
at com.sun.proxy.$Proxy13.getBlockLocations(Unknown Source)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getBlockLocations(ClientNamenodeProtocolTranslatorPB.java:219)
at
org.apache.hadoop.hdfs.DFSClient.callGetBlockLocations(DFSClient.java:1145)
... 22 more
On Fri, Aug 21, 2015 at 3:52 PM, Jeff Quinn <[email protected]> wrote:
> Also worth noting, we inspected the hadoop configuration defaults that the
> AWS EMR service populates for the two different instance types, for
> mapred-site.xml, core-site.xml, and hdfs-site.xml all settings were
> identical, with the exception of slight differences in JVM memory allotted.
> Further investigated the max number of file descriptors for each instance
> type via ulimit, and saw no differences there either.
>
> So not sure what the main difference is between these two clusters that
> would cause these very different outcomes, other than cc2.8xlarge having
> SSDs and c3.8xlarge having spinning disks.
>
> On Fri, Aug 21, 2015 at 1:03 PM, Everett Anderson <[email protected]>
> wrote:
>
>> Hey,
>>
>> Jeff graciously agreed to try it out.
>>
>> I'm afraid we're still getting failures on that instance type, though
>> with 0.11 with the patches, the cluster ended up in a state that no new
>> applications could be submitted afterwards.
>>
>> The errors when running the pipeline seem to be similarly HDFS related.
>> It's quite odd.
>>
>> Examples when using 0.11 + the patches:
>>
>>
>> 2015-08-20 23:17:50,455 WARN [Thread-38]
>> org.apache.hadoop.hdfs.DFSClient: Could not get block locations. Source
>> file
>> "/tmp/crunch-274499863/p504/output/_temporary/1/_temporary/attempt_1440102643297_out0_0107_r_000001_0/out0-r-00001"
>> - Aborting...
>>
>>
>> 2015-08-20 22:39:42,184 WARN [Thread-51]
>> org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
>> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException):
>> No lease on
>> /tmp/crunch-274499863/p510/output/_temporary/1/_temporary/attempt_1440102643297_out12_0103_r_000167_2/out12-r-00167
>> (inode 83784): File does not exist. [Lease. Holder:
>> DFSClient_attempt_1440102643297_0103_r_000167_2_964529009_1,
>> pendingcreates: 24]
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:3516)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.abandonBlock(FSNamesystem.java:3486)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.abandonBlock(NameNodeRpcServer.java:687)
>> at
>> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.abandonBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:467)
>> at
>> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
>> at
>> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:635)
>> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:962)
>> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2039)
>> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2035)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at javax.security.auth.Subject.doAs(Subject.java:415)
>> at
>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
>> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2033)
>>
>> at org.apache.hadoop.ipc.Client.call(Client.java:1468)
>> at org.apache.hadoop.ipc.Client.call(Client.java:1399)
>> at
>> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:241)
>> at com.sun.proxy.$Proxy13.abandonBlock(Unknown Source)
>> at
>> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.abandonBlock(ClientNamenodeProtocolTranslatorPB.java:376)
>> at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:606)
>> at
>> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
>> at
>> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
>> at com.sun.proxy.$Proxy14.abandonBlock(Unknown Source)
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1377)
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:594)
>> 2015-08-20 22:39:42,184 WARN [Thread-51]
>> org.apache.hadoop.hdfs.DFSClient: Could not get block locations. Source
>> file
>> "/tmp/crunch-274499863/p510/output/_temporary/1/_temporary/attempt_1440102643297_out12_0103_r_000167_2/out12-r-00167"
>> - Aborting...
>>
>>
>>
>> 2015-08-20 23:34:59,276 INFO [Thread-37]
>> org.apache.hadoop.hdfs.DFSClient: Exception in createBlockOutputStream
>> java.io.IOException: Bad connect ack with firstBadLink as
>> 10.55.1.103:50010
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1472)
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1373)
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:594)
>> 2015-08-20 23:34:59,276 INFO [Thread-37]
>> org.apache.hadoop.hdfs.DFSClient: Abandoning
>> BP-835517662-10.55.1.32-1440102626965:blk_1073828261_95268
>> 2015-08-20 23:34:59,278 INFO [Thread-37]
>> org.apache.hadoop.hdfs.DFSClient: Excluding datanode 10.55.1.103:50010
>> 2015-08-20 23:34:59,278 WARN [Thread-37]
>> org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
>> java.io.IOException: Unable to create new block.
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1386)
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:594)
>> 2015-08-20 23:34:59,278 WARN [Thread-37]
>> org.apache.hadoop.hdfs.DFSClient: Could not get block locations. Source
>> file
>> "/tmp/crunch-274499863/p504/output/_temporary/1/_temporary/attempt_1440102643297_out0_0107_r_000001_2/out0-r-00001"
>> - Aborting...
>> 2015-08-20 23:34:59,279 WARN [main] org.apache.hadoop.mapred.YarnChild:
>> Exception running child : org.apache.crunch.CrunchRuntimeException:
>> java.io.IOException: Bad connect ack with firstBadLink as
>> 10.55.1.103:50010
>> at
>> org.apache.crunch.impl.mr.run.CrunchTaskContext.cleanup(CrunchTaskContext.java:74)
>> at
>> org.apache.crunch.impl.mr.run.CrunchReducer.cleanup(CrunchReducer.java:64)
>> at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:195)
>> at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:656)
>> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:394)
>> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:171)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at javax.security.auth.Subject.doAs(Subject.java:415)
>> at
>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
>> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:166)
>> Caused by: java.io.IOException: Bad connect ack with firstBadLink as
>> 10.55.1.103:50010
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1472)
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1373)
>> at
>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:594)
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Fri, Aug 21, 2015 at 11:59 AM, Josh Wills <[email protected]> wrote:
>>
>>> Curious how this went. :)
>>>
>>> On Tue, Aug 18, 2015 at 4:26 PM, Everett Anderson <[email protected]>
>>> wrote:
>>>
>>>> Sure, let me give it a try. I'm going to take 0.11 and patch it with
>>>>
>>>> https://issues.apache.org/jira/browse/CRUNCH-553
>>>> https://issues.apache.org/jira/browse/CRUNCH-517
>>>>
>>>> as we also rely on 517.
>>>>
>>>>
>>>>
>>>> On Tue, Aug 18, 2015 at 4:09 PM, Josh Wills <[email protected]>
>>>> wrote:
>>>>
>>>>> (In particular, I'm wondering if something in CRUNCH-481 is related to
>>>>> this problem.)
>>>>>
>>>>> On Tue, Aug 18, 2015 at 4:07 PM, Josh Wills <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> Hey Everett,
>>>>>>
>>>>>> Shot in the dark-- would you mind trying it w/0.11.0-hadoop2 w/the
>>>>>> 553 patch? Is that easy to do?
>>>>>>
>>>>>> J
>>>>>>
>>>>>> On Tue, Aug 18, 2015 at 3:18 PM, Everett Anderson <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> I verified that the pipeline succeeds on the same cc2.8xlarge
>>>>>>> hardware when setting crunch.max.running.jobs to 1. I generally
>>>>>>> feel like the pipeline application itself logic is sound, at this
>>>>>>> point. It
>>>>>>> could be that this is just taxing these machines too hard and we need to
>>>>>>> increase the number of retries?
>>>>>>>
>>>>>>> It reliably fails on this hardware when crunch.max.running.jobs set
>>>>>>> to its default.
>>>>>>>
>>>>>>> Can you explain a little what the /tmp/crunch-XXXXXXX files are as
>>>>>>> well as how Crunch uses side effect files? Do you know if HDFS would
>>>>>>> clean
>>>>>>> up those directories from underneath Crunch?
>>>>>>>
>>>>>>> There are usually 4 failed applications, failing due to reduces. The
>>>>>>> failures seem to be one of the following three kinds -- (1) No lease on
>>>>>>> <side effect file>, (2) File not found </tmp/crunch-XXXXXXX> file, (3)
>>>>>>> SocketTimeoutException.
>>>>>>>
>>>>>>> Examples:
>>>>>>>
>>>>>>> [1] No lease exception
>>>>>>>
>>>>>>> Error: org.apache.crunch.CrunchRuntimeException:
>>>>>>> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException):
>>>>>>> No lease on
>>>>>>> /tmp/crunch-4694113/p662/output/_temporary/1/_temporary/attempt_1439917295505_out7_0018_r_000003_1/out7-r-00003:
>>>>>>> File does not exist. Holder
>>>>>>> DFSClient_attempt_1439917295505_0018_r_000003_1_824053899_1 does not
>>>>>>> have
>>>>>>> any open files. at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:2944)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFileInternal(FSNamesystem.java:3008)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFile(FSNamesystem.java:2988)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.complete(NameNodeRpcServer.java:641)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.complete(ClientNamenodeProtocolServerSideTranslatorPB.java:484)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
>>>>>>> at
>>>>>>> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:599)
>>>>>>> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928) at
>>>>>>> org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013) at
>>>>>>> org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009) at
>>>>>>> java.security.AccessController.doPrivileged(Native Method) at
>>>>>>> javax.security.auth.Subject.doAs(Subject.java:415) at
>>>>>>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
>>>>>>> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007) at
>>>>>>> org.apache.crunch.impl.mr.run.CrunchTaskContext.cleanup(CrunchTaskContext.java:74)
>>>>>>> at
>>>>>>> org.apache.crunch.impl.mr.run.CrunchReducer.cleanup(CrunchReducer.java:64)
>>>>>>> at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:195) at
>>>>>>> org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:656)
>>>>>>> at
>>>>>>> org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:394) at
>>>>>>> org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:175) at
>>>>>>> java.security.AccessController.doPrivileged(Native Method) at
>>>>>>> javax.security.auth.Subject.doAs(Subject.java:415) at
>>>>>>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
>>>>>>> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:170) Caused
>>>>>>> by:
>>>>>>> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException):
>>>>>>> No lease on
>>>>>>> /tmp/crunch-4694113/p662/output/_temporary/1/_temporary/attempt_1439917295505_out7_0018_r_000003_1/out7-r-00003:
>>>>>>> File does not exist. Holder
>>>>>>> DFSClient_attempt_1439917295505_0018_r_000003_1_824053899_1 does not
>>>>>>> have
>>>>>>> any open files. at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:2944)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFileInternal(FSNamesystem.java:3008)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFile(FSNamesystem.java:2988)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.complete(NameNodeRpcServer.java:641)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.complete(ClientNamenodeProtocolServerSideTranslatorPB.java:484)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
>>>>>>> at
>>>>>>> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:599)
>>>>>>> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928) at
>>>>>>> org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013) at
>>>>>>> org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009) at
>>>>>>> java.security.AccessController.doPrivileged(Native Method) at
>>>>>>> javax.security.auth.Subject.doAs(Subject.java:415) at
>>>>>>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
>>>>>>> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007) at
>>>>>>> org.apache.hadoop.ipc.Client.call(Client.java:1410) at
>>>>>>> org.apache.hadoop.ipc.Client.call(Client.java:1363) at
>>>>>>> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:215)
>>>>>>> at com.sun.proxy.$Proxy13.complete(Unknown Source) at
>>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
>>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>>>>>>> at
>>>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>>>>>> at java.lang.reflect.Method.invoke(Method.java:606) at
>>>>>>> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:190)
>>>>>>> at
>>>>>>> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:103)
>>>>>>> at com.sun.proxy.$Proxy13.complete(Unknown Source) at
>>>>>>> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.complete(ClientNamenodeProtocolTranslatorPB.java:404)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSOutputStream.completeFile(DFSOutputStream.java:2130)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:2114)
>>>>>>> at
>>>>>>> org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:72)
>>>>>>> at
>>>>>>> org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:105)
>>>>>>> at
>>>>>>> org.apache.hadoop.io.SequenceFile$Writer.close(SequenceFile.java:1289)
>>>>>>> at
>>>>>>> org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat$1.close(SequenceFileOutputFormat.java:87)
>>>>>>> at
>>>>>>> org.apache.crunch.io.CrunchOutputs$OutputState.close(CrunchOutputs.java:300)
>>>>>>> at org.apache.crunch.io.CrunchOutputs.close(CrunchOutputs.java:180) at
>>>>>>> org.apache.crunch.impl.mr.run.CrunchTaskContext.cleanup(CrunchTaskContext.java:72)
>>>>>>> ... 9 more
>>>>>>>
>>>>>>>
>>>>>>> [2] File does not exist
>>>>>>>
>>>>>>> 2015-08-18 17:36:10,195 INFO [AsyncDispatcher event handler]
>>>>>>> org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl:
>>>>>>> Diagnostics report from attempt_1439917295505_0034_r_000004_1: Error:
>>>>>>> org.apache.crunch.CrunchRuntimeException: Could not read runtime node
>>>>>>> information
>>>>>>> at
>>>>>>> org.apache.crunch.impl.mr.run.CrunchTaskContext.<init>(CrunchTaskContext.java:48)
>>>>>>> at
>>>>>>> org.apache.crunch.impl.mr.run.CrunchReducer.setup(CrunchReducer.java:40)
>>>>>>> at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:172)
>>>>>>> at
>>>>>>> org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:656)
>>>>>>> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:394)
>>>>>>> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:175)
>>>>>>> at java.security.AccessController.doPrivileged(Native Method)
>>>>>>> at javax.security.auth.Subject.doAs(Subject.java:415)
>>>>>>> at
>>>>>>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
>>>>>>> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:170)
>>>>>>> Caused by: java.io.FileNotFoundException: File does not exist:
>>>>>>> /tmp/crunch-4694113/p470/REDUCE
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:65)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:55)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsUpdateTimes(FSNamesystem.java:1726)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsInt(FSNamesystem.java:1669)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1649)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1621)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getBlockLocations(NameNodeRpcServer.java:497)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getBlockLocations(ClientNamenodeProtocolServerSideTranslatorPB.java:322)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
>>>>>>> at
>>>>>>> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:599)
>>>>>>> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
>>>>>>> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013)
>>>>>>> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009)
>>>>>>> at java.security.AccessController.doPrivileged(Native Method)
>>>>>>> at javax.security.auth.Subject.doAs(Subject.java:415)
>>>>>>> at
>>>>>>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
>>>>>>> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007)
>>>>>>>
>>>>>>> at
>>>>>>> sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>>>>>>> at
>>>>>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
>>>>>>> at
>>>>>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>>>>>>> at
>>>>>>> java.lang.reflect.Constructor.newInstance(Constructor.java:526)
>>>>>>> at
>>>>>>> org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:106)
>>>>>>> at
>>>>>>> org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:73)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSClient.callGetBlockLocations(DFSClient.java:1147)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSClient.getLocatedBlocks(DFSClient.java:1135)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSClient.getLocatedBlocks(DFSClient.java:1125)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSInputStream.fetchLocatedBlocksAndGetLastBlockLength(DFSInputStream.java:273)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSInputStream.openInfo(DFSInputStream.java:240)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSInputStream.<init>(DFSInputStream.java:233)
>>>>>>> at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:1298)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:300)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:296)
>>>>>>> at
>>>>>>> org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:296)
>>>>>>> at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:768)
>>>>>>> at org.apache.crunch.util.DistCache.read(DistCache.java:72)
>>>>>>> at
>>>>>>> org.apache.crunch.impl.mr.run.CrunchTaskContext.<init>(CrunchTaskContext.java:46)
>>>>>>> ... 9 more
>>>>>>>
>>>>>>> [3] SocketTimeoutException
>>>>>>>
>>>>>>> Error: org.apache.crunch.CrunchRuntimeException:
>>>>>>> java.net.SocketTimeoutException: 70000 millis timeout while waiting for
>>>>>>> channel to be ready for read. ch :
>>>>>>> java.nio.channels.SocketChannel[connected local=/10.55.1.229:35720
>>>>>>> remote=/10.55.1.230:9200] at
>>>>>>> org.apache.crunch.impl.mr.run.CrunchTaskContext.cleanup(CrunchTaskContext.java:74)
>>>>>>> at
>>>>>>> org.apache.crunch.impl.mr.run.CrunchReducer.cleanup(CrunchReducer.java:64)
>>>>>>> at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:195) at
>>>>>>> org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:656)
>>>>>>> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:394) at
>>>>>>> org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:175) at
>>>>>>> java.security.AccessController.doPrivileged(Native Method) at
>>>>>>> javax.security.auth.Subject.doAs(Subject.java:415) at
>>>>>>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
>>>>>>> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:170) Caused
>>>>>>> by: java.net.SocketTimeoutException: 70000 millis timeout while waiting
>>>>>>> for channel to be ready for read. ch :
>>>>>>> java.nio.channels.SocketChannel[connected local=/10.55.1.229:35720
>>>>>>> remote=/10.55.1.230:9200] at
>>>>>>> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
>>>>>>> at
>>>>>>> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:161)
>>>>>>> at
>>>>>>> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:131)
>>>>>>> at
>>>>>>> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:118)
>>>>>>> at java.io.FilterInputStream.read(FilterInputStream.java:83) at
>>>>>>> java.io.FilterInputStream.read(FilterInputStream.java:83) at
>>>>>>> org.apache.hadoop.hdfs.protocolPB.PBHelper.vintPrefixed(PBHelper.java:1985)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:1075)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:1042)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1186)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:935)
>>>>>>> at
>>>>>>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:491)
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Fri, Aug 14, 2015 at 3:54 PM, Everett Anderson <[email protected]>
>>>>>>> wrote:
>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Fri, Aug 14, 2015 at 3:26 PM, Josh Wills <[email protected]>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Hey Everett,
>>>>>>>>>
>>>>>>>>> Initial thought-- there are lots of reasons for lease expired
>>>>>>>>> exceptions, and their usually more symptomatic of other problems in
>>>>>>>>> the
>>>>>>>>> pipeline. Are you sure none of the jobs in the Crunch pipeline on the
>>>>>>>>> non-SSD instances are failing for some other reason? I'd be surprised
>>>>>>>>> if no
>>>>>>>>> other errors showed up in the app master, although there are reports
>>>>>>>>> of
>>>>>>>>> some weirdness around LeaseExpireds when writing to S3-- but you're
>>>>>>>>> not
>>>>>>>>> doing that here, right?
>>>>>>>>>
>>>>>>>>
>>>>>>>> We're reading from and writing to HDFS, here. (We've copied in
>>>>>>>> input from S3 to HDFS in another step.)
>>>>>>>>
>>>>>>>> There are a few exceptions in the logs. Most seem related to
>>>>>>>> missing temp files.
>>>>>>>>
>>>>>>>> Let me see if I can reproduce it with crunch.max.running.jobs set
>>>>>>>> to 1 to try to narrow down the originating failure.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>> J
>>>>>>>>>
>>>>>>>>> On Fri, Aug 14, 2015 at 2:10 PM, Everett Anderson <
>>>>>>>>> [email protected]> wrote:
>>>>>>>>>
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> I recently started trying to run our Crunch pipeline on more data
>>>>>>>>>> and have been trying out different AWS instance types in
>>>>>>>>>> anticipation of
>>>>>>>>>> our storage and compute needs.
>>>>>>>>>>
>>>>>>>>>> I was using EMR 3.8 (so Hadoop 2.4.0) with Crunch 0.12 (patched
>>>>>>>>>> with the CRUNCH-553
>>>>>>>>>> <https://issues.apache.org/jira/browse/CRUNCH-553> fix).
>>>>>>>>>>
>>>>>>>>>> Our pipeline finishes fine in these cluster configurations:
>>>>>>>>>>
>>>>>>>>>> - 50 c3.4xlarge Core, 0 Task
>>>>>>>>>> - 10 c3.8xlarge Core, 0 Task
>>>>>>>>>> - 25 c3.8xlarge Core, 0 Task
>>>>>>>>>>
>>>>>>>>>> However, it always fails on the same data when using 10
>>>>>>>>>> cc2.8xlarge Core instances.
>>>>>>>>>>
>>>>>>>>>> The biggest obvious hardware difference is that the cc2.8xlarges
>>>>>>>>>> use hard disks instead of SSDs.
>>>>>>>>>>
>>>>>>>>>> While it's a little hard to track down the exact originating
>>>>>>>>>> failure, I think it's from errors like:
>>>>>>>>>>
>>>>>>>>>> 2015-08-13 21:34:38,379 ERROR [IPC Server handler 24 on 45711]
>>>>>>>>>> org.apache.hadoop.mapred.TaskAttemptListenerImpl: Task:
>>>>>>>>>> attempt_1439499407003_0028_r_000153_1 - exited :
>>>>>>>>>> org.apache.crunch.CrunchRuntimeException:
>>>>>>>>>> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException):
>>>>>>>>>> No lease on
>>>>>>>>>> /tmp/crunch-970849245/p662/output/_temporary/1/_temporary/attempt_1439499407003_out7_0028_r_000153_1/out7-r-00153:
>>>>>>>>>> File does not exist. Holder
>>>>>>>>>> DFSClient_attempt_1439499407003_0028_r_000153_1_609888542_1 does not
>>>>>>>>>> have
>>>>>>>>>> any open files.
>>>>>>>>>>
>>>>>>>>>> Those paths look like these side effect files
>>>>>>>>>> <https://hadoop.apache.org/docs/r2.4.1/api/org/apache/hadoop/mapred/FileOutputFormat.html#getWorkOutputPath(org.apache.hadoop.mapred.JobConf)>
>>>>>>>>>> .
>>>>>>>>>>
>>>>>>>>>> Would Crunch have generated applications that depend on side
>>>>>>>>>> effect paths as input across MapReduce applications and something in
>>>>>>>>>> HDFS
>>>>>>>>>> is cleaning up those paths, unaware of the higher level
>>>>>>>>>> dependencies? AWS
>>>>>>>>>> configures Hadoop differently for each instance type, and might have
>>>>>>>>>> more
>>>>>>>>>> aggressive cleanup settings on HDs, though this is very uninformed
>>>>>>>>>> hypothesis.
>>>>>>>>>>
>>>>>>>>>> A sample full log is attached.
>>>>>>>>>>
>>>>>>>>>> Thanks for any guidance!
>>>>>>>>>>
>>>>>>>>>> - Everett
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> *DISCLAIMER:* The contents of this email, including any
>>>>>>>>>> attachments, may contain information that is confidential,
>>>>>>>>>> proprietary in
>>>>>>>>>> nature, protected health information (PHI), or otherwise protected
>>>>>>>>>> by law
>>>>>>>>>> from disclosure, and is solely for the use of the intended
>>>>>>>>>> recipient(s). If
>>>>>>>>>> you are not the intended recipient, you are hereby notified that any
>>>>>>>>>> use,
>>>>>>>>>> disclosure or copying of this email, including any attachments, is
>>>>>>>>>> unauthorized and strictly prohibited. If you have received this
>>>>>>>>>> email in
>>>>>>>>>> error, please notify the sender of this email. Please delete this
>>>>>>>>>> and all
>>>>>>>>>> copies of this email from your system. Any opinions either expressed
>>>>>>>>>> or
>>>>>>>>>> implied in this email and all attachments, are those of its author
>>>>>>>>>> only,
>>>>>>>>>> and do not necessarily reflect those of Nuna Health, Inc.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Director of Data Science
>>>>>>>>> Cloudera <http://www.cloudera.com>
>>>>>>>>> Twitter: @josh_wills <http://twitter.com/josh_wills>
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> *DISCLAIMER:* The contents of this email, including any
>>>>>>> attachments, may contain information that is confidential, proprietary
>>>>>>> in
>>>>>>> nature, protected health information (PHI), or otherwise protected by
>>>>>>> law
>>>>>>> from disclosure, and is solely for the use of the intended
>>>>>>> recipient(s). If
>>>>>>> you are not the intended recipient, you are hereby notified that any
>>>>>>> use,
>>>>>>> disclosure or copying of this email, including any attachments, is
>>>>>>> unauthorized and strictly prohibited. If you have received this email in
>>>>>>> error, please notify the sender of this email. Please delete this and
>>>>>>> all
>>>>>>> copies of this email from your system. Any opinions either expressed or
>>>>>>> implied in this email and all attachments, are those of its author only,
>>>>>>> and do not necessarily reflect those of Nuna Health, Inc.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Director of Data Science
>>>>>> Cloudera <http://www.cloudera.com>
>>>>>> Twitter: @josh_wills <http://twitter.com/josh_wills>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Director of Data Science
>>>>> Cloudera <http://www.cloudera.com>
>>>>> Twitter: @josh_wills <http://twitter.com/josh_wills>
>>>>>
>>>>
>>>>
>>>> *DISCLAIMER:* The contents of this email, including any attachments,
>>>> may contain information that is confidential, proprietary in nature,
>>>> protected health information (PHI), or otherwise protected by law from
>>>> disclosure, and is solely for the use of the intended recipient(s). If you
>>>> are not the intended recipient, you are hereby notified that any use,
>>>> disclosure or copying of this email, including any attachments, is
>>>> unauthorized and strictly prohibited. If you have received this email in
>>>> error, please notify the sender of this email. Please delete this and all
>>>> copies of this email from your system. Any opinions either expressed or
>>>> implied in this email and all attachments, are those of its author only,
>>>> and do not necessarily reflect those of Nuna Health, Inc.
>>>>
>>>
>>>
>>>
>>> --
>>> Director of Data Science
>>> Cloudera <http://www.cloudera.com>
>>> Twitter: @josh_wills <http://twitter.com/josh_wills>
>>>
>>
>>
>
--
*DISCLAIMER:* The contents of this email, including any attachments, may
contain information that is confidential, proprietary in nature, protected
health information (PHI), or otherwise protected by law from disclosure,
and is solely for the use of the intended recipient(s). If you are not the
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copying of this email, including any attachments, is unauthorized and
strictly prohibited. If you have received this email in error, please
notify the sender of this email. Please delete this and all copies of this
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