原文地址：https://community.cloudera.com/t5/Support-Questions/Too-many-open-files/td-p/93078

    This is because the limit file (/proc//limit) of the process has a “Max open files” of 1024 which is to low for most operations.

    A solution for this since it uses systemd on RHEL/CentOS 7 is to do the following:

    1. # make a folder for custom systemd changes for this service
    2. mkdir -p /etc/systemd/system/cloudera-director-server.service.d/
    4. # make an override conf file so that a Director upgrade will not break the changes
    5. vim /etc/systemd/system/cloudera-director-server.service.d/override.conf
    7. # then add the following in that file and save/quit it
    8. [Service]
    9. LimitNOFILE=65536
    11. # next reload the daemon
    12. systemctl daemon-reload
    14. # finally restart Director
    15. systemctl restart cloudera-director-server

    Then if you check the limit file in the new process you will see it show 65536 as the “Max open files”.

    Hopefully this can help someone in the future. Cheers!

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