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From "Hailu, Andreas" <Andreas.Ha...@gs.com>
Subject RE: History Server Not Showing Any Jobs - File Not Found?
Date Thu, 28 May 2020 16:17:40 GMT
Okay, I will look further to see if we're mistakenly using a version that's pre-2.6.0. However,
I don't see flink-shaded-hadoop in my /lib directory for flink-1.9.1.

flink-dist_2.11-1.9.1.jar
flink-table-blink_2.11-1.9.1.jar
flink-table_2.11-1.9.1.jar
log4j-1.2.17.jar
slf4j-log4j12-1.7.15.jar

Are the files within /lib.

// ah

From: Chesnay Schepler <chesnay@apache.org>
Sent: Thursday, May 28, 2020 11:00 AM
To: Hailu, Andreas [Engineering] <Andreas.Hailu@ny.email.gs.com>; user@flink.apache.org
Subject: Re: History Server Not Showing Any Jobs - File Not Found?

Looks like it is indeed stuck on downloading the archive.

I searched a bit in the Hadoop JIRA and found several similar instances:
https://issues.apache.org/jira/browse/HDFS-6999<https://urldefense.proofpoint.com/v2/url?u=https-3A__issues.apache.org_jira_browse_HDFS-2D6999&d=DwMD-g&c=7563p3e2zaQw0AB1wrFVgyagb2IE5rTZOYPxLxfZlX4&r=hRr4SA7BtUvKoMBP6VDhfisy2OJ1ZAzai-pcCC6TFXM&m=b1rFpuaq4HMshPx-d-0ZmaazccTuKjDKzJjF0WZSIso&s=wtWbBz9FrMlr29HibXGZvdcsFC1wqyVPulrYiTewpoQ&e=>
https://issues.apache.org/jira/browse/HDFS-7005<https://urldefense.proofpoint.com/v2/url?u=https-3A__issues.apache.org_jira_browse_HDFS-2D7005&d=DwMD-g&c=7563p3e2zaQw0AB1wrFVgyagb2IE5rTZOYPxLxfZlX4&r=hRr4SA7BtUvKoMBP6VDhfisy2OJ1ZAzai-pcCC6TFXM&m=b1rFpuaq4HMshPx-d-0ZmaazccTuKjDKzJjF0WZSIso&s=0KgRQHmW0Xj6NToNVzoi9iAGh1SIbfe8cnCqj1TXuW8&e=>
https://issues.apache.org/jira/browse/HDFS-7145<https://urldefense.proofpoint.com/v2/url?u=https-3A__issues.apache.org_jira_browse_HDFS-2D7145&d=DwMD-g&c=7563p3e2zaQw0AB1wrFVgyagb2IE5rTZOYPxLxfZlX4&r=hRr4SA7BtUvKoMBP6VDhfisy2OJ1ZAzai-pcCC6TFXM&m=b1rFpuaq4HMshPx-d-0ZmaazccTuKjDKzJjF0WZSIso&s=oy8z5gRd6dNDURDDH20f2yiplIuJ9qnYZeVpTIrHMwc&e=>

It is supposed to be fixed in 2.6.0 though :/

If hadoop is available from the HADOOP_CLASSPATH and flink-shaded-hadoop in /lib then you
basically don't know what Hadoop version is actually being used,
which could lead to incompatibilities and dependency clashes.
If flink-shaded-hadoop 2.4/2.5 is on the classpath, maybe that is being used and runs into
HDFS-7005.

On 28/05/2020 16:27, Hailu, Andreas wrote:
Just created a dump, here's what I see:

"Flink-HistoryServer-ArchiveFetcher-thread-1" #19 daemon prio=5 os_prio=0 tid=0x00007f93a5a2c000
nid=0x5692 runnable [0x00007f934a0d3000]
   java.lang.Thread.State: RUNNABLE
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
        - locked <0x00000005df986960> (a sun.nio.ch.Util$2)
        - locked <0x00000005df986948> (a java.util.Collections$UnmodifiableSet)
        - locked <0x00000005df928390> (a sun.nio.ch.EPollSelectorImpl)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
        at org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWithTimeout.java:335)
        at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:157)
        at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:161)
        at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.readChannelFully(PacketReceiver.java:258)
        at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doReadFully(PacketReceiver.java:209)
        at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doRead(PacketReceiver.java:171)
        at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.receiveNextPacket(PacketReceiver.java:102)
        at org.apache.hadoop.hdfs.RemoteBlockReader2.readNextPacket(RemoteBlockReader2.java:201)
        at org.apache.hadoop.hdfs.RemoteBlockReader2.read(RemoteBlockReader2.java:152)
        - locked <0x00000005ceade5e0> (a org.apache.hadoop.hdfs.RemoteBlockReader2)
        at org.apache.hadoop.hdfs.DFSInputStream$ByteArrayStrategy.doRead(DFSInputStream.java:781)
        at org.apache.hadoop.hdfs.DFSInputStream.readBuffer(DFSInputStream.java:837)
        - eliminated <0x00000005cead3688> (a org.apache.hadoop.hdfs.DFSInputStream)
        at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:897)
        - locked <0x00000005cead3688> (a org.apache.hadoop.hdfs.DFSInputStream)
       at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:945)
        - locked <0x00000005cead3688> (a org.apache.hadoop.hdfs.DFSInputStream)
        at java.io.DataInputStream.read(DataInputStream.java:149)
        at org.apache.flink.runtime.fs.hdfs.HadoopDataInputStream.read(HadoopDataInputStream.java:94)
        at java.io.InputStream.read(InputStream.java:101)
        at org.apache.flink.util.IOUtils.copyBytes(IOUtils.java:69)
        at org.apache.flink.util.IOUtils.copyBytes(IOUtils.java:91)
        at org.apache.flink.runtime.history.FsJobArchivist.getArchivedJsons(FsJobArchivist.java:110)
        at org.apache.flink.runtime.webmonitor.history.HistoryServerArchiveFetcher$JobArchiveFetcherTask.run(HistoryServerArchiveFetcher.java:169)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

What problems could the flink-shaded-hadoop jar being included introduce?

// ah

From: Chesnay Schepler <chesnay@apache.org><mailto:chesnay@apache.org>
Sent: Thursday, May 28, 2020 9:26 AM
To: Hailu, Andreas [Engineering] <Andreas.Hailu@ny.email.gs.com><mailto:Andreas.Hailu@ny.email.gs.com>;
user@flink.apache.org<mailto:user@flink.apache.org>
Subject: Re: History Server Not Showing Any Jobs - File Not Found?

If it were a class-loading issue I would think that we'd see an exception of some kind. Maybe
double-check that flink-shaded-hadoop is not in the lib directory. (usually I would ask for
the full classpath that the HS is started with, but as it turns out this isn't getting logged
:( (FLINK-18008))

The fact that overview.json and jobs/overview.json are missing indicates that something goes
wrong directly on startup. What is supposed to happens is that the HS starts, fetches all
currently available archives and then creates these files.
So it seems like the download gets stuck for some reason.

Can you use jstack to create a thread dump, and see what the Flink-HistoryServer-ArchiveFetcher
is doing?

I will also file a JIRA for adding more logging statements, like when fetching starts/stops.

On 27/05/2020 20:57, Hailu, Andreas wrote:
Hi Chesney, apologies for not getting back to you sooner here. So I did what you suggested
- I downloaded a few files from my jobmanager.archive.fs.dir HDFS directory to a locally available
directory named /local/scratch/hailua_p2epdlsuat/historyserver/archived/. I then changed my
historyserver.archive.fs.dir to file:///local/scratch/hailua_p2epdlsuat/historyserver/archived/
and that seemed to work. I'm able to see the history of the applications I downloaded. So
this points to a problem with sourcing the history from HDFS.

Do you think this could be classpath related? This is what we use for our HADOOP_CLASSPATH
var:
/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop/*:/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop/lib/*:/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop-hdfs/*:/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop-hdfs/lib/*:/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop-mapreduce/*:/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop-mapreduce/lib/*:/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop-yarn/*:/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop-yarn/lib/*:/gns/software/ep/da/dataproc/dataproc-prod/lakeRmProxy.jar:/gns/software/infra/big-data/hadoop/hdp-2.6.5.0/hadoop/bin::/gns/mw/dbclient/postgres/jdbc/pg-jdbc-9.3.v01/postgresql-9.3-1100-jdbc4.jar

You can see we have references to Hadoop mapred/yarn/hdfs libs in there.

// ah

From: Chesnay Schepler <chesnay@apache.org><mailto:chesnay@apache.org>
Sent: Sunday, May 3, 2020 6:00 PM
To: Hailu, Andreas [Engineering] <Andreas.Hailu@ny.email.gs.com><mailto:Andreas.Hailu@ny.email.gs.com>;
user@flink.apache.org<mailto:user@flink.apache.org>
Subject: Re: History Server Not Showing Any Jobs - File Not Found?

yes, exactly; I want to rule out that (somehow) HDFS is the problem.

I couldn't reproduce the issue locally myself so far.

On 01/05/2020 22:31, Hailu, Andreas wrote:
Hi Chesnay, yes - they were created using Flink 1.9.1 as we've only just started to archive
them in the past couple weeks. Could you clarify on how you want to try local filesystem archives?
As in changing jobmanager.archive.fs.dir and historyserver.web.tmpdir to the same local directory?

// ah

From: Chesnay Schepler <chesnay@apache.org><mailto:chesnay@apache.org>
Sent: Wednesday, April 29, 2020 8:26 AM
To: Hailu, Andreas [Engineering] <Andreas.Hailu@ny.email.gs.com><mailto:Andreas.Hailu@ny.email.gs.com>;
user@flink.apache.org<mailto:user@flink.apache.org>
Subject: Re: History Server Not Showing Any Jobs - File Not Found?

hmm...let's see if I can reproduce the issue locally.

Are the archives from the same version the history server runs on? (Which I supposed would
be 1.9.1?)

Just for the sake of narrowing things down, it would also be interesting to check if it works
with the archives residing in the local filesystem.

On 27/04/2020 18:35, Hailu, Andreas wrote:
bash-4.1$ ls -l /local/scratch/flink_historyserver_tmpdir/
total 8
drwxrwxr-x 3 p2epdlsuat p2epdlsuat 4096 Apr 21 10:43 flink-web-history-7fbb97cc-9f38-4844-9bcf-6272fe6828e9
drwxrwxr-x 3 p2epdlsuat p2epdlsuat 4096 Apr 21 10:22 flink-web-history-95b3f928-c60f-4351-9926-766c6ad3ee76

There are just two directories in here. I don't see cache directories from my attempts today,
which is interesting. Looking a little deeper into them:

bash-4.1$ ls -lr /local/scratch/flink_historyserver_tmpdir/flink-web-history-7fbb97cc-9f38-4844-9bcf-6272fe6828e9
total 1756
drwxrwxr-x 2 p2epdlsuat p2epdlsuat 1789952 Apr 21 10:44 jobs
bash-4.1$ ls -lr /local/scratch/flink_historyserver_tmpdir/flink-web-history-7fbb97cc-9f38-4844-9bcf-6272fe6828e9/jobs
total 0
-rw-rw-r-- 1 p2epdlsuat p2epdlsuat 0 Apr 21 10:43 overview.json

There are indeed archives already in HDFS - I've included some in my initial mail, but here
they are again just for reference:
-bash-4.1$ hdfs dfs -ls /user/p2epda/lake/delp_qa/flink_hs
Found 44282 items
-rw-r-----   3 delp datalake_admin_dev      50569 2020-03-21 23:17 /user/p2epda/lake/delp_qa/flink_hs/000144dba9dc0f235768a46b2f26e936
-rw-r-----   3 delp datalake_admin_dev      49578 2020-03-03 08:45 /user/p2epda/lake/delp_qa/flink_hs/000347625d8128ee3fd0b672018e38a5
-rw-r-----   3 delp datalake_admin_dev      50842 2020-03-24 15:19 /user/p2epda/lake/delp_qa/flink_hs/0004be6ce01ba9677d1eb619ad0fa757
...


// ah

From: Chesnay Schepler <chesnay@apache.org><mailto:chesnay@apache.org>
Sent: Monday, April 27, 2020 10:28 AM
To: Hailu, Andreas [Engineering] <Andreas.Hailu@ny.email.gs.com><mailto:Andreas.Hailu@ny.email.gs.com>;
user@flink.apache.org<mailto:user@flink.apache.org>
Subject: Re: History Server Not Showing Any Jobs - File Not Found?

If historyserver.web.tmpdir is not set then java.io.tmpdir is used, so that should be fine.

What are the contents of /local/scratch/flink_historyserver_tmpdir?
I assume there are already archives in HDFS?

On 27/04/2020 16:02, Hailu, Andreas wrote:
My machine's /tmp directory is not large enough to support the archived files, so I changed
my java.io.tmpdir to be in some other location which is significantly larger. I hadn't set
anything for historyserver.web.tmpdir, so I suspect it was still pointing at /tmp. I just
tried setting historyserver.web.tmpdir to the same location as my java.io.tmpdir location,
but I'm afraid I'm still seeing the following issue:

2020-04-27 09:37:42,904 [nioEventLoopGroup-3-4] DEBUG HistoryServerStaticFileServerHandler
- Unable to load requested file /overview.json from classloader
2020-04-27 09:37:42,906 [nioEventLoopGroup-3-6] DEBUG HistoryServerStaticFileServerHandler
- Unable to load requested file /jobs/overview.json from classloader

flink-conf.yaml for reference:
jobmanager.archive.fs.dir: hdfs:///user/p2epda/lake/delp_qa/flink_hs/
historyserver.archive.fs.dir: hdfs:///user/p2epda/lake/delp_qa/flink_hs/
historyserver.web.tmpdir: /local/scratch/flink_historyserver_tmpdir/

Did you have anything else in mind when you said pointing somewhere funny?

// ah

From: Chesnay Schepler <chesnay@apache.org><mailto:chesnay@apache.org>
Sent: Monday, April 27, 2020 5:56 AM
To: Hailu, Andreas [Engineering] <Andreas.Hailu@ny.email.gs.com><mailto:Andreas.Hailu@ny.email.gs.com>;
user@flink.apache.org<mailto:user@flink.apache.org>
Subject: Re: History Server Not Showing Any Jobs - File Not Found?


overview.json is a generated file that is placed in the local directory controlled by historyserver.web.tmpdir.

Have you configured this option to point to some non-local filesystem? (Or if not, is the
java.io.tmpdir property pointing somewhere funny?)
On 24/04/2020 18:24, Hailu, Andreas wrote:
I'm having a further look at the code in HistoryServerStaticFileServerHandler - is there an
assumption about where overview.json is supposed to be located?

// ah

From: Hailu, Andreas [Engineering]
Sent: Wednesday, April 22, 2020 1:32 PM
To: 'Chesnay Schepler' <chesnay@apache.org><mailto:chesnay@apache.org>; Hailu,
Andreas [Engineering] <Andreas.Hailu@ny.email.gs.com><mailto:Andreas.Hailu@ny.email.gs.com>;
user@flink.apache.org<mailto:user@flink.apache.org>
Subject: RE: History Server Not Showing Any Jobs - File Not Found?

Hi Chesnay, thanks for responding. We're using Flink 1.9.1. I enabled DEBUG level logging
and this is something relevant I see:

2020-04-22 13:25:52,566 [Flink-HistoryServer-ArchiveFetcher-thread-1] DEBUG DFSInputStream
- Connecting to datanode 10.79.252.101:1019
2020-04-22 13:25:52,567 [Flink-HistoryServer-ArchiveFetcher-thread-1] DEBUG SaslDataTransferClient
- SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false
2020-04-22 13:25:52,567 [Flink-HistoryServer-ArchiveFetcher-thread-1] DEBUG SaslDataTransferClient
- SASL client skipping handshake in secured configuration with privileged port for addr =
/10.79.252.101, datanodeId = DatanodeI
nfoWithStorage[10.79.252.101:1019,DS-7f4ec55d-7c5f-4a0e-b817-d9e635480b21,DISK]
2020-04-22 13:25:52,571 [Flink-HistoryServer-ArchiveFetcher-thread-1] DEBUG DFSInputStream
- DFSInputStream has been closed already
2020-04-22 13:25:52,573 [nioEventLoopGroup-3-6] DEBUG HistoryServerStaticFileServerHandler
- Unable to load requested file /jobs/overview.json from classloader
2020-04-22 13:25:52,576 [IPC Parameter Sending Thread #0] DEBUG Client$Connection$3 - IPC
Client (1578587450) connection to d279536-002.dc.gs.com/10.59.61.87:8020 from delp@GS.COM<mailto:delp@GS.COM>
sending #1391

Aside from that, it looks like a lot of logging around datanodes and block location metadata.
Did I miss something in my classpath, perhaps? If so, do you have a suggestion on what I could
try?

// ah

From: Chesnay Schepler <chesnay@apache.org<mailto:chesnay@apache.org>>
Sent: Wednesday, April 22, 2020 2:16 AM
To: Hailu, Andreas [Engineering] <Andreas.Hailu@ny.email.gs.com<mailto:Andreas.Hailu@ny.email.gs.com>>;
user@flink.apache.org<mailto:user@flink.apache.org>
Subject: Re: History Server Not Showing Any Jobs - File Not Found?

Which Flink version are you using?
Have you checked the history server logs after enabling debug logging?

On 21/04/2020 17:16, Hailu, Andreas [Engineering] wrote:
Hi,

I'm trying to set up the History Server, but none of my applications are showing up in the
Web UI. Looking at the console, I see that all of the calls to /overview return the following
404 response: {"errors":["File not found."]}.

I've set up my configuration as follows:

JobManager Archive directory:
jobmanager.archive.fs.dir: hdfs:///user/p2epda/lake/delp_qa/flink_hs/
-bash-4.1$ hdfs dfs -ls /user/p2epda/lake/delp_qa/flink_hs
Found 44282 items
-rw-r-----   3 delp datalake_admin_dev      50569 2020-03-21 23:17 /user/p2epda/lake/delp_qa/flink_hs/000144dba9dc0f235768a46b2f26e936
-rw-r-----   3 delp datalake_admin_dev      49578 2020-03-03 08:45 /user/p2epda/lake/delp_qa/flink_hs/000347625d8128ee3fd0b672018e38a5
-rw-r-----   3 delp datalake_admin_dev      50842 2020-03-24 15:19 /user/p2epda/lake/delp_qa/flink_hs/0004be6ce01ba9677d1eb619ad0fa757
...
...

History Server will fetch the archived jobs from the same location:
historyserver.archive.fs.dir: hdfs:///user/p2epda/lake/delp_qa/flink_hs/

So I'm able to confirm that there are indeed archived applications that I should be able to
view in the histserver. I'm not able to find out what file the overview service is looking
for from the repository - any suggestions as to what I could look into next?

Best,
Andreas

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Your Personal Data: We may collect and process information about you that may be subject to
data protection laws. For more information about how we use and disclose your personal data,
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Your Personal Data: We may collect and process information about you that may be subject to
data protection laws. For more information about how we use and disclose your personal data,
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who you can contact, please refer to: www.gs.com/privacy-notices<http://www.gs.com/privacy-notices>



________________________________

Your Personal Data: We may collect and process information about you that may be subject to
data protection laws. For more information about how we use and disclose your personal data,
how we protect your information, our legal basis to use your information, your rights and
who you can contact, please refer to: www.gs.com/privacy-notices<http://www.gs.com/privacy-notices>



________________________________

Your Personal Data: We may collect and process information about you that may be subject to
data protection laws. For more information about how we use and disclose your personal data,
how we protect your information, our legal basis to use your information, your rights and
who you can contact, please refer to: www.gs.com/privacy-notices<http://www.gs.com/privacy-notices>



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Your Personal Data: We may collect and process information about you that may be subject to
data protection laws. For more information about how we use and disclose your personal data,
how we protect your information, our legal basis to use your information, your rights and
who you can contact, please refer to: www.gs.com/privacy-notices<http://www.gs.com/privacy-notices>



________________________________

Your Personal Data: We may collect and process information about you that may be subject to
data protection laws. For more information about how we use and disclose your personal data,
how we protect your information, our legal basis to use your information, your rights and
who you can contact, please refer to: www.gs.com/privacy-notices<http://www.gs.com/privacy-notices>

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