# Server disk broken and recover, but failed to start

**URL:** <https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140>\
**Category:** Elasticsearch\
**Created:** [July 22, 2020, 6:51am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140 "2020-07-22T06:51:18Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![jinjinbari](https://avatars.discourse-cdn.com/v4/letter/j/ce73a5/32.png) [@jinjinbari](https://discuss.elastic.co/u/jinjinbari)\
**Post date:** [July 22, 2020, 6:51am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140/1 "2020-07-22T06:51:19Z")

</div>

Hello.

My server disk was broken and recover now.

But the elasticsearch service isn`t started.

Here is my logs.

```auto
[2020-07-22T15:54:22,153][INFO][o.e.e.NodeEnvironment] [apm-data-node4] using [1] data paths, mounts [[/data/1 (/dev/mapper/vg_data-lv_data1)]], net usable_space [934.6gb], net total_space [1.7tb], types [xfs]
[2020-07-22T15:54:22,155][INFO][o.e.e.NodeEnvironment] [apm-data-node4] heap size [3.8gb], compressed ordinary object pointers [true]
[2020-07-22T15:54:22,699][INFO][o.e.n.Node] [apm-data-node4] node name [apm-data-node4], node ID [B9s7SzjMRE65YF4wrULl7Q]
[2020-07-22T15:54:22,700][INFO][o.e.n.Node] [apm-data-node4] version[6.5.4], pid[25116], build[default/rpm/d2ef93d/2018-12-17T21:17:40.758843Z], OS[Linux/3.10.0-693.21.1.el7.x86_64/amd64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_201/25.201-b09]
[2020-07-22T15:54:22,700][INFO][o.e.n.Node] [apm-data-node4] JVM arguments [-ea, -Xms20g, -Xmx20g, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Des.cgroups.hierarchy.override=/, -Xms4g, -Xmx4g, -Dfile.encoding=UTF-8, -Djna.nosys=true, -XX:-OmitStackTraceInFastThrow, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Djava.io.tmpdir=/tmp/elasticsearch.YJ1pgI3u, -XX:+HeapDumpOnOutOfMemoryError, -XX:HeapDumpPath=/var/lib/elasticsearch, -XX:ErrorFile=/var/log/elasticsearch/hs_err_pid%p.log, -XX:+PrintGCDetails, -XX:+PrintGCDateStamps, -XX:+PrintTenuringDistribution, -XX:+PrintGCApplicationStoppedTime, -Xloggc:/var/log/elasticsearch/gc.log, -XX:+UseGCLogFileRotation, -XX:NumberOfGCLogFiles=32, -XX:GCLogFileSize=64m, -Des.path.home=/usr/share/elasticsearch, -Des.path.conf=/etc/elasticsearch, -Des.distribution.flavor=default, -Des.distribution.type=rpm]
[2020-07-22T15:54:23,860][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [aggs-matrix-stats]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [analysis-common]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [ingest-common]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [lang-expression]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [lang-mustache]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [lang-painless]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [mapper-extras]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [parent-join]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [percolator]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [rank-eval]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [reindex]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [repository-url]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [transport-netty4]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [tribe]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-ccr]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-core]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-deprecation]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-graph]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-logstash]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-ml]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-monitoring]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-rollup]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-security]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-sql]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-upgrade]
[2020-07-22T15:54:23,861][INFO][o.e.p.PluginsService] [apm-data-node4] loaded module [x-pack-watcher]
[2020-07-22T15:54:23,862][INFO][o.e.p.PluginsService] [apm-data-node4] no plugins loaded
[2020-07-22T15:54:23,880][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [apm-data-node4] fatal error in thread [main], exiting
java.lang.AssertionError: null
        at org.elasticsearch.monitor.os.OsProbe.getCgroup(OsProbe.java:487) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.monitor.os.OsProbe.osStats(OsProbe.java:531) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.xpack.ml.MachineLearning.additionalSettings(MachineLearning.java:327) ~[?:?]
        at org.elasticsearch.plugins.PluginsService.updatedSettings(PluginsService.java:203) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.node.Node.<init>(Node.java:339) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.node.Node.<init>(Node.java:265) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:212) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:212) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.5.4.jar:6.5.4]
        at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.5.4.jar:6.5.4]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.5.4.jar:6.5.4]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.5.4.jar:6.5.4]

```

How can I fix this?

Thank you

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 22, 2020, 6:52am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140/2 "2020-07-22T06:52:06Z")

</div>

Is that all that is in the logs?

---

<div class="post-metadata">

**Author:** ![jinjinbari](https://avatars.discourse-cdn.com/v4/letter/j/ce73a5/32.png) [@jinjinbari](https://discuss.elastic.co/u/jinjinbari)\
**Post date:** [July 22, 2020, 6:56am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140/3 "2020-07-22T06:56:16Z")

</div>

Hi~ I edit the logs. Thank you

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 22, 2020, 6:56am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140/4 "2020-07-22T06:56:41Z")

</div>

Thanks!  
Is there anything after that last entry?

---

<div class="post-metadata">

**Author:** ![jinjinbari](https://avatars.discourse-cdn.com/v4/letter/j/ce73a5/32.png) [@jinjinbari](https://discuss.elastic.co/u/jinjinbari)\
**Post date:** [July 22, 2020, 6:59am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140/5 "2020-07-22T06:59:49Z")

</div>

Yes.. There are no more logs after last entry..

---

<div class="post-metadata">

**Author:** ![Steve\_Mushero](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/steve_mushero/32/22441_2.png) [@Steve\_Mushero](https://discuss.elastic.co/u/Steve_Mushero)\
**Post date:** [July 23, 2020, 4:44am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140/6 "2020-07-23T04:44:21Z")

</div>

Why is -Xms, -Xmx on the command line twice? Both for 20G and 4G?

This in docker, as I see OsProbe.getCgroup as last area the exception happened, which is odd - any other strange settings as it's still probing for OS and related settings.

Looks like a CentOS VM but maybe some weird cgroup settings, like cgroup is returning null, which I suspect it should not do (I think Linux has a default cgroup).

Seems this happens sometimes, see these and fixed in V7.4

> <https://github.com/elastic/elasticsearch/issues/27031>
>
> \`\`\`
> \]\[WARN \]\[o.e.b.ElasticsearchUncaughtExceptionHandler\] \[\*\*\*\*\*\*\*\*\] uncaught e…xception in thread \[main\]
> org.elasticsearch.bootstrap.StartupException: java.lang.NullPointerException
> at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:123) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:70) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:134) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.cli.Command.main(Command.java:90) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> Caused by: java.lang.NullPointerException
> at sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:273) ~\[?:?\]
> at org.elasticsearch.common.io.PathUtils.get(PathUtils.java:60) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.monitor.os.OsProbe.readSysFsCgroupCpuAcctCpuAcctUsage(OsProbe.java:274) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.monitor.os.OsProbe.getCgroupCpuAcctUsageNanos(OsProbe.java:261) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.monitor.os.OsProbe.getCgroup(OsProbe.java:419) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.monitor.os.OsProbe.osStats(OsProbe.java:464) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.monitor.os.OsService.\<init\>(OsService.java:45) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.monitor.MonitorService.\<init\>(MonitorService.java:45) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.node.Node.\<init\>(Node.java:362) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.node.Node.\<init\>(Node.java:245) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.bootstrap.Bootstrap$5.\<init\>(Bootstrap.java:233) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:233) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:342) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:132) ~\[elasticsearch-5.6.3.jar:5.6.3\]
> \`\`\`

> <https://github.com/elastic/elasticsearch/issues/45396>
>
> \*\*Elasticsearch version\*\* (\`bin/elasticsearch --version\`):
> 6.8.1 (Gentoo ebuild…)
> running in a systemd nspawn container
> 
> \*\*Plugins installed\*\*: \[\]
> 
> \*\*JVM version\*\* (\`java -version\`):
> openjdk version "1.8.0\_212"
> OpenJDK Runtime Environment (IcedTea 3.12.0) (Gentoo icedtea-3.12.0)
> OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)
> 
> \*\*OS version\*\* (\`uname -a\` if on a Unix-like system):
> Linux es6 5.2.7-gentoo #1 SMP Fri Aug 9 11:40:38 CEST 2019 x86\_64 Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz GenuineIntel GNU/Linux
> 
> \*\*Description of the problem including expected versus actual behavior\*\*:
> Since upgrading ES in my development container, it no longer starts. It crashes with a stack trace pointing to problems determining cgroup controllers. Researching other reports showed that the problem should be fixed, but it still shows for me. Logs below.
> 
> Last known good version:
> \`Sat Sep 15 02:21:22 2018 \>\>\> app-misc/elasticsearch-6.4.0\`
> 
> \*\*Steps to reproduce\*\*:
> 
> \`\`\`
> es6 ~ # ls -l /sys/fs/cgroup
> insgesamt 0
> drwxr-xr-x 2 nobody nobody 0 9. Aug 17:42 blkio
> drwxr-xr-x 2 nobody nobody 0 9. Aug 17:42 cpu
> lrwxrwxrwx 1 root root 3 9. Aug 17:42 cpuacct -\> cpu
> drwxr-xr-x 2 nobody nobody 0 9. Aug 17:42 devices
> drwxr-xr-x 2 nobody nobody 0 9. Aug 17:42 memory
> dr-xr-xr-x 2 nobody nobody 0 9. Aug 11:57 net\_cls
> lrwxrwxrwx 1 root root 7 9. Aug 17:42 net\_prio -\> net\_cls
> drwxr-xr-x 2 nobody nobody 0 9. Aug 17:42 pids
> drwxr-xr-x 5 root root 0 9. Aug 17:42 systemd
> drwxr-xr-x 5 root root 0 9. Aug 17:42 unified
> 
> es6 ~ # cat /proc/cgroups
> \#subsys\_name hierarchy num\_cgroups enabled
> cpu 2 88 1
> blkio 4 108 1
> memory 5 128 1
> devices 3 86 1
> net\_cls 6 1 1
> pids 7 92 1
> 
> es6 ~ # cat /proc/self/cgroup
> 7:pids:/
> 6:net\_cls:/
> 5:memory:/
> 4:blkio:/
> 3:devices:/
> 2:cpu:/
> 1:name=systemd:/user.slice/user-0.slice/session-c1.scope
> 0::/user.slice/user-0.slice/session-c1.scope
> 
> es6 ~ # mount -t cgroup
> cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
> cgroup on /sys/fs/cgroup/net\_cls type cgroup (rw,nosuid,nodev,noexec,relatime,net\_cls)
> cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
> cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
> cgroup on /sys/fs/cgroup/cpu type cgroup (rw,nosuid,nodev,noexec,relatime,cpu)
> cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
> cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
> 
> es6 ~ # grep cgroup /proc/self/mountinfo
> 1067 1141 0:106 / /sys/fs/cgroup ro,nosuid,nodev,noexec - tmpfs tmpfs ro,mode=755,uid=65536,gid=65536
> 1068 1067 0:29 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,memory
> 1069 1067 0:30 / /sys/fs/cgroup/net\_cls rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,net\_cls
> 1070 1067 0:27 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,devices
> 1071 1067 0:28 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,blkio
> 1073 1067 0:26 / /sys/fs/cgroup/cpu rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,cpu
> 1074 1067 0:31 / /sys/fs/cgroup/pids rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,pids
> 1075 1067 0:21 / /sys/fs/cgroup/unified rw,nosuid,nodev,noexec,relatime - cgroup2 cgroup rw,nsdelegate
> 1076 1067 0:22 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,xattr,name=systemd
> 
> \# FULL LOG AT THE END
> es6 ~ # systemctl start elasticsearch.service
> es6 ~ # systemctl status elasticsearch.service
> ● elasticsearch.service - Elasticsearch
> Loaded: loaded (/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
> Drop-In: /etc/systemd/system/elasticsearch.service.d
> └─00gentoo.conf, override.conf
> Active: failed (Result: exit-code) since Fri 2019-08-09 18:18:28 CEST; 640ms ago
> Docs: https://www.elastic.co
> Process: 437 ExecStartPre=/usr/share/elasticsearch/bin/elasticsearch-systemd-pre-exec (code=exited, status=0/SUCCESS)
> Process: 438 ExecStart=/usr/share/elasticsearch/bin/elasticsearch -p ${PID\_DIR}/elasticsearch.pid -Epath.logs=${LOG\_DIR} -Epath.data=${DATA\_DIR} (code=exited, status=1/FAILURE)
> Main PID: 438 (code=exited, status=1/FAILURE)
> 
> Aug 09 18:18:28 es6 elasticsearch\[438\]: at org.elasticsearch.monitor.MonitorService.\<init\>(MonitorService.java:46) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> Aug 09 18:18:28 es6 elasticsearch\[438\]: at org.elasticsearch.node.Node.\<init\>(Node.java:399) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> Aug 09 18:18:28 es6 elasticsearch\[438\]: at org.elasticsearch.node.Node.\<init\>(Node.java:266) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> Aug 09 18:18:28 es6 elasticsearch\[438\]: at org.elasticsearch.bootstrap.Bootstrap$5.\<init\>(Bootstrap.java:212) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> Aug 09 18:18:28 es6 elasticsearch\[438\]: at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:212) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> Aug 09 18:18:28 es6 elasticsearch\[438\]: at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> Aug 09 18:18:28 es6 elasticsearch\[438\]: at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> Aug 09 18:18:28 es6 elasticsearch\[438\]: ... 6 more
> Aug 09 18:18:28 es6 systemd\[1\]: elasticsearch.service: Main process exited, code=exited, status=1/FAILURE
> Aug 09 18:18:28 es6 systemd\[1\]: elasticsearch.service: Failed with result 'exit-code'.
> \`\`\`
> 
> \*\*Provide logs (if relevant)\*\*:
> \`\`\`
> java.lang.NullPointerException: null
> at sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:273) ~\[?:?\]
> at org.elasticsearch.common.io.PathUtils.get(PathUtils.java:60) ~\[elasticsearch-core-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsProbe.readSysFsCgroupCpuAcctCpuAcctUsage(OsProbe.java:277) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsProbe.getCgroupCpuAcctUsageNanos(OsProbe.java:264) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsProbe.getCgroup(OsProbe.java:483) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsProbe.osStats(OsProbe.java:603) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsService.\<init\>(OsService.java:49) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.MonitorService.\<init\>(MonitorService.java:46) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.node.Node.\<init\>(Node.java:399) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.node.Node.\<init\>(Node.java:266) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Bootstrap$5.\<init\>(Bootstrap.java:212) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:212) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) \[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) \[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) \[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) \[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) \[elasticsearch-cli-6.8.1.jar:6.8.1\]
> at org.elasticsearch.cli.Command.main(Command.java:90) \[elasticsearch-cli-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:116) \[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) \[elasticsearch-6.8.1.jar:6.8.1\]
> \[2019-08-09T17:46:33,105\]\[WARN \]\[o.e.b.ElasticsearchUncaughtExceptionHandler\] \[QoY4z88\] uncaught exception in thread \[main\]
> org.elasticsearch.bootstrap.StartupException: java.lang.NullPointerException
> at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:163) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~\[elasticsearch-cli-6.8.1.jar:6.8.1\]
> at org.elasticsearch.cli.Command.main(Command.java:90) ~\[elasticsearch-cli-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:116) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> Caused by: java.lang.NullPointerException
> at sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:273) ~\[?:?\]
> at org.elasticsearch.common.io.PathUtils.get(PathUtils.java:60) ~\[elasticsearch-core-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsProbe.readSysFsCgroupCpuAcctCpuAcctUsage(OsProbe.java:277) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsProbe.getCgroupCpuAcctUsageNanos(OsProbe.java:264) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsProbe.getCgroup(OsProbe.java:483) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsProbe.osStats(OsProbe.java:603) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.os.OsService.\<init\>(OsService.java:49) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.monitor.MonitorService.\<init\>(MonitorService.java:46) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.node.Node.\<init\>(Node.java:399) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.node.Node.\<init\>(Node.java:266) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Bootstrap$5.\<init\>(Bootstrap.java:212) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:212) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~\[elasticsearch-6.8.1.jar:6.8.1\]
> ... 6 more
> \`\`\`

Also some workarounds here:

> [@Why elasticsearch-5.2.0 throw NullPointerException when start](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/14):
>
> Sorry, I don't know. Okay, you can work around this with: $ sudo mount -t cgroup -o rw,nosuid,nodev,noexec,relatime,cpu,cpuacct cgroup /sys/fs/cgroup/cpu,cpuacct

---

<div class="post-metadata">

**Author:** ![jinjinbari](https://avatars.discourse-cdn.com/v4/letter/j/ce73a5/32.png) [@jinjinbari](https://discuss.elastic.co/u/jinjinbari)\
**Post date:** [July 23, 2020, 6:52am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140/7 "2020-07-23T06:52:06Z")

</div>

Thank you

It had problems for mount.

I mounted cgroups, then the elasticsearch was started.

Thank you for your help 🙂

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 20, 2020, 6:52am UTC](https://discuss.elastic.co/t/server-disk-broken-and-recover-but-failed-to-start/242140/8 "2020-08-20T06:52:10Z")

</div>

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