1) It downloads all archives and stores them on disk; the only thing stored in memory is the job ID or the archive. There is no hard upper limit; it is mostly constrained by disk space / memory. I say mostly, because I'm not sure how well the WebUI handles 100k jobs being loaded into the overview.

2) No, there is no retention policy. It is currently expected that an external process cleans up archives. If an archive was deleted (from the archive directory) the HistoryServer does notice that and also delete the local copy.

On 01/06/2020 23:05, Hailu, Andreas wrote:

So I created a new HDFS directory with just 1 archive and pointed the server to monitor that directory, et voila – I’m able to see the applications in the UI. So it must have been really churning trying to fetch all of those initial archives J

I have a couple of follow up questions if you please:

1.What is the upper limit of the number of archives the history server can support? Does it attempt to download every archive and load them all into memory?

2.Retention: we have on the order of 100K applications per day in our production environment. Is there any native retention of policy? E.g. only keep the latest X archives in the dir - or is this something we need to manage ourselves?

Thanks.

*// *ah**

*From:*Hailu, Andreas [Engineering]
*Sent:* Friday, May 29, 2020 8:46 AM
*To:* 'Chesnay Schepler' <ches...@apache.org>; user@flink.apache.org
*Subject:* RE: History Server Not Showing Any Jobs - File Not Found?

Yes, these are all in the same directory, and we’re at 67G right now. I’ll try with incrementally smaller directories and let you know what I find.

*// *ah**

*From:*Chesnay Schepler <ches...@apache.org <mailto:ches...@apache.org>>
*Sent:* Friday, May 29, 2020 3:11 AM
*To:* Hailu, Andreas [Engineering] <andreas.ha...@ny.email.gs.com <mailto:andreas.ha...@ny.email.gs.com>>; user@flink.apache.org <mailto:user@flink.apache.org>
*Subject:* Re: History Server Not Showing Any Jobs - File Not Found?

oh I'm not using the HistoryServer; I just wrote it ;)

Are these archives all in the same location? So we're roughly looking at 5 GB of archives then?

That could indeed "just" be a resource problem. The HistoryServer eagerly downloads all archives, and not on-demand.

The next step would be to move some of the archives into a separate HDFS directory and try again.

(Note that by configuring "historyserver.web.tmpdir" to some permanent directory subsequent (re)starts of the HistorySserver can re-use this directory; so you only have to download things once)

On 29/05/2020 00:43, Hailu, Andreas wrote:

    May I also ask what version of flink-hadoop you’re using and the
    number of jobs you’re storing the history for? As of writing we
    have roughly 101,000 application history files. I’m curious to
    know if we’re encountering some kind of resource problem.

    *// *ah

    *From:*Hailu, Andreas [Engineering]
    *Sent:* Thursday, May 28, 2020 12:18 PM
    *To:* 'Chesnay Schepler' <ches...@apache.org>
    <mailto:ches...@apache.org>; user@flink.apache.org
    <mailto:user@flink.apache.org>
    *Subject:* RE: History Server Not Showing Any Jobs - File Not Found?

    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 <ches...@apache.org
    <mailto:ches...@apache.org>>
    *Sent:* Thursday, May 28, 2020 11:00 AM
    *To:* Hailu, Andreas [Engineering] <andreas.ha...@ny.email.gs.com
    <mailto:andreas.ha...@ny.email.gs.com>>; user@flink.apache.org
    <mailto: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 <ches...@apache.org>
        <mailto:ches...@apache.org>
        *Sent:* Thursday, May 28, 2020 9:26 AM
        *To:* Hailu, Andreas [Engineering]
        <andreas.ha...@ny.email.gs.com>
        <mailto:andreas.ha...@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 <ches...@apache.org>
            <mailto:ches...@apache.org>
            *Sent:* Sunday, May 3, 2020 6:00 PM
            *To:* Hailu, Andreas [Engineering]
            <andreas.ha...@ny.email.gs.com>
            <mailto:andreas.ha...@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 <ches...@apache.org>
                <mailto:ches...@apache.org>
                *Sent:* Wednesday, April 29, 2020 8:26 AM
                *To:* Hailu, Andreas [Engineering]
                <andreas.ha...@ny.email.gs.com>
                <mailto:andreas.ha...@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 <ches...@apache.org>
                    <mailto:ches...@apache.org>
                    *Sent:* Monday, April 27, 2020 10:28 AM
                    *To:* Hailu, Andreas [Engineering]
                    <andreas.ha...@ny.email.gs.com>
                    <mailto:andreas.ha...@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 <ches...@apache.org>
                        <mailto:ches...@apache.org>
                        *Sent:* Monday, April 27, 2020 5:56 AM
                        *To:* Hailu, Andreas [Engineering]
                        <andreas.ha...@ny.email.gs.com>
                        <mailto:andreas.ha...@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'
                            <ches...@apache.org>
                            <mailto:ches...@apache.org>; Hailu,
                            Andreas [Engineering]
                            <andreas.ha...@ny.email.gs.com>
                            <mailto:andreas.ha...@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 d...@gs.com <mailto:d...@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
                            <ches...@apache.org
                            <mailto:ches...@apache.org>>
                            *Sent:* Wednesday, April 22, 2020 2:16 AM
                            *To:* Hailu, Andreas [Engineering]
                            <andreas.ha...@ny.email.gs.com
                            <mailto:andreas.ha...@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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