Re: [EXTERNAL] Re: Master-Slave being DB locked both

[Jose Manuel Vega Monroy <jo...@williamhill.com>]

@Tim @Jean

Problem was in /etc/fstab with some errors (example, fstype 'nfs4' being deprecated) + probably app exiting wrongly.

After fixing, and rebooting some nodes, since blocked seeing the same lock, everything working fine.

Thanks

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On 07/05/2020, 04:27, "Tim Bain" <tb...@alumni.duke.edu> wrote:

    I'm not an NFS expert, but is vers=300 really correct? I don't think
    there's an NFSv300.

    Also, note that ActiveMQ offers the best support for shared-filesystem
    master-slave on NFSv4, whereas NFSv3 has undesirable behavior (described in
    https://urldefense.proofpoint.com/v2/url?u=https-3A__activemq.apache.org_shared-2Dfile-2Dsystem-2Dmaster-2Dslave&d=DwIFaQ&c=pWn2jKJ-j-AhxLuiRFe-Qw&r=i5Pk4pirVCmwsmddZqplM1jyQtVWeoOOb-vkuqku5P8&m=8tL802CIya_rK8mQBPHeKphxZsUXfdRmgC8Mfr3BJEU&s=1xyOO7nCJvrfhLxtmpyCa6ZhgeR3EmEvSPp-nnClI54&e= ) that might be
    what you're describing. (Though your description sounds like it might be
    occurring even after terminating all brokers, so maybe it's similar but
    different.) Either way, if you're trying to run with NFSv3, you might want
    to switch to v4 if that's an option.

    Tim

    On Wed, May 6, 2020, 8:35 AM Jean-Baptiste Onofre <jb...@nanthrax.net> wrote:

    > Hi,
    >
    > If it’s on NFS, what’s your rsize/wsize and sync mode enabled ?
    >
    > Regards
    > JB
    >
    > > Le 6 mai 2020 à 16:29, Jose Manuel Vega Monroy <
    > jose.monroy@williamhill.com> a écrit :
    > >
    > > Hi there,
    > >
    > > With broker 5.15.0-1.el7.centos, looking like master and slave both
    > brokers keeping DB locked with NFS remote share.
    > >
    > > 2020-05-06 15:08:52,372 [main] INFO
    > (AbstractApplicationContext.java:583) - Refreshing
    > org.apache.activemq.xbean.XBeanBrokerFactory$1@5025a98f: startup date
    > [Wed May 06 15:08:52 BST 2020]; root of context hierarchy
    > > 2020-05-06 15:08:52,444 [main] INFO  (XmlBeanDefinitionReader.java:317)
    > - Loading XML bean definitions from class path resource [activemq.xml]
    > > 2020-05-06 15:08:52,909 [main] INFO  (XmlBeanDefinitionReader.java:317)
    > - Loading XML bean definitions from class path resource [jetty.xml]
    > > 2020-05-06 15:08:53,357 [main] INFO  (BrokerService.java:683) - Using
    > Persistence Adapter: KahaDBPersistenceAdapter[/mnt/sbm]
    > > 2020-05-06 15:08:59,463 [main] INFO  (SharedFileLocker.java:70) -
    > Database /mnt/sbm/lock is locked by another server. This broker is now in
    > slave mode waiting a lock to be acquired
    > >
    > > Any idea why this could be happening?
    > >
    > > Having in /etc/fstab:
    > >
    > >
    > <NFS_SERVER>:/<NFS_SHARE_NAME>/mnt/sbmnfstcp,rsize=32768,wsize=32768,intr,noatime,actimeo=3,vers=300
    > >
    > > And config:
    > >
    > >  <persistenceAdapter>
    > >            <kahaDB directory="/mnt/sbm"
    > >                    enableIndexWriteAsync="true"
    > >                    ignoreMissingJournalfiles="true"
    > >                    checkForCorruptJournalFiles="true"
    > >                    checksumJournalFiles="true"
    > >                    preallocationStrategy="zeros"
    > >            />
    > >        </persistenceAdapter>
    > >
    > > Thanks
    > >
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