Unable to start bitbucket server

[Christopher Agland-Williams]

When I installed Bitbucket server, I set the home directory in /backup/ as that has my large spinning hard disk as the primary drive is not big enough, here is the error I am getting when trying to start

[root@titan bin]# ./start-bitbucket.sh
Starting Atlassian Bitbucket as dedicated user atlbitbucket
runuser: warning: cannot change directory to /backup/atlassian/bitbucket: Permission denied
-bash: /backup/atlassian/bitbucket/.bash_profile: Permission denied

Copying Elasticsearch configuration to /backup/bitbucket/shared/search
mkdir: cannot create directory ‘/backup’: Permission denied
mv: failed to access ‘/backup/bitbucket/shared/search/elasticsearch.yml.bak_version2’: Permission denied
mv: failed to access ‘/backup/bitbucket/shared/search/logging.yml.bak_version2’: Permission denied
cp: failed to access ‘/backup/bitbucket/shared/search’: Permission denied
cp: failed to access ‘/backup/bitbucket/shared/search’: Permission denied
cp: failed to access ‘/backup/bitbucket/shared/search’: Permission denied

Setting Elasticsearch configuration to version 2
/opt/atlassian/bitbucket/5.11.1/bin/_start-search.sh: line 37: /backup/bitbucket/shared/search/.version: Permission denied

Starting bundled Elasticsearch
        Hint: Run start-bitbucket.sh --no-search to skip starting Elasticsearch
Bundled Elasticsearch started successfully

Bitbucket is being run with a umask that contains potentially unsafe settings.
The following issues were found with the mask "u=rwx,g=rwx,o=rx" (0002):
 - Access is allowed to 'others'. It is recommended that 'others' be denied
   all access for security reasons.
 - Write access is allowed to 'group'. It is recommend that 'group' be
   denied write access. Read access to a restricted group is recommended
   to allow access to the logs.
The recommended umask for Bitbucket is "u=,g=w,o=rwx" (0027) and can be
configured in _start-webapp.sh

The current open files limit is set to less than 4096
Attempting to increase limit...
        Limit increased to 4096 open files
mkdir: cannot create directory ‘/backup’: Permission denied
/backup/bitbucket/log could not be created. Permissions issue?
The Bitbucket webapp was not started
[root@titan bin]# 2018-07-07 12:57:15,748 main ERROR Could not register mbeans java.security.AccessControlException: access denied ("javax.management.MBeanTrustPermission" "register")
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:472)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:585)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.checkMBeanTrustPermission(DefaultMBeanServerInterceptor.java:1848)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:322)
        at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
        at org.apache.logging.log4j.core.jmx.Server.register(Server.java:389)
        at org.apache.logging.log4j.core.jmx.Server.reregisterMBeansAfterReconfigure(Server.java:167)
        at org.apache.logging.log4j.core.jmx.Server.reregisterMBeansAfterReconfigure(Server.java:140)
        at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:556)
        at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:261)
        at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:206)
        at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:221)
        at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:197)
        at org.elasticsearch.common.logging.LogConfigurator.configureStatusLogger(LogConfigurator.java:175)
        at org.elasticsearch.common.logging.LogConfigurator.configureWithoutConfig(LogConfigurator.java:99)
        at org.elasticsearch.cli.Command.main(Command.java:85)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84)

Exception in thread "main" java.lang.IllegalStateException: status logger logged an error before logging was configured
        at org.elasticsearch.common.logging.LogConfigurator.checkErrorListener(LogConfigurator.java:128)
        at org.elasticsearch.common.logging.LogConfigurator.configure(LogConfigurator.java:117)
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:316)
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123)
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114)
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67)
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122)
        at org.elasticsearch.cli.Command.main(Command.java:88)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84)
Refer to the log for complete error details.

 even though the permissions for the folder is correct,

[root@titan backup]# ls -l
total 0
drwxrwxrwx 3 atlbitbucket atlbitbucket 20 Jul  7 12:52 bitbucket

 EDIT: I have checked and the /dev/sda1(backup) folder is correctly mounted.