topic Re: Failed to install Third node - Dynatrace Managed in Dynatrace Managed Q&A

Failed to install Third node - Dynatrace Managed

cleber_sanches — Wed, 06 Mar 2024 19:30:31 GMT

Hello Community.
I'm trying to add one more node to my Managed Cluster. However, there is an error when uploading the "Server" service. The error showing is this:

[2024-03-06 14:53:25.114 UTC] [000091c3] [severe ] [java] [stderr] OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x0000001000800000, 33285996544, 0) failed; error='Not enough space' (errno=12)
[2024-03-06 14:53:25.114 UTC] [000091c3] [info ] [java] [stdout] #
[2024-03-06 14:53:25.114 UTC] [000091c3] [info ] [java] [stdout] # There is insufficient memory for the Java Runtime Environment to continue.
[2024-03-06 14:53:25.114 UTC] [000091c3] [info ] [java] [stdout] # Native memory allocation (mmap) failed to map 33285996544 bytes for committing reserved memory.

I have already added memory to this No, but it always complains that it needs more memory.
Has anyone ever encountered an error like this?

Tks for help,

Cleber

Re: Failed to install Third node - Dynatrace Managed

Mohamed_Hamdy — Thu, 07 Mar 2024 05:55:21 GMT

Hello @cleber_sanches ,

is it possible to run the below command and provide us with the result?

cat /proc/meminfo

Re: Failed to install Third node - Dynatrace Managed

Suryanto_1 — Thu, 07 Mar 2024 06:14:36 GMT

Hope this helps!

https://stackoverflow.com/questions/46801741/jvm-crashes-with-error-cannot-allocate-memory-errno-12

Re: Failed to install Third node - Dynatrace Managed

Babar_Qayyum — Thu, 07 Mar 2024 06:37:02 GMT

Hello @cleber_sanches

I would recommend following the Multi-node installation guidelines. I recently faced a weird issue with one of the customers due to the mismatch between the resources.

https://docs.dynatrace.com/managed/shortlink/managed-requirements#multi-node-installations

Regards,

Babar

Re: Failed to install Third node - Dynatrace Managed

cleber_sanches — Thu, 07 Mar 2024 13:10:37 GMT

Hi @Mohamed_Hamdy .

MemTotal: 98817580 kB
MemFree: 17065652 kB
MemAvailable: 31970060 kB
Buffers: 26672 kB
Cached: 15086264 kB
SwapCached: 0 kB
Active: 6154892 kB
Inactive: 9570808 kB
Active(anon): 617664 kB
Inactive(anon): 3016 kB
Active(file): 5537228 kB
Inactive(file): 9567792 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 420 kB
Writeback: 0 kB
AnonPages: 612788 kB
Mapped: 191816 kB
Shmem: 7916 kB
Slab: 564168 kB
SReclaimable: 460212 kB
SUnreclaim: 103956 kB
KernelStack: 8768 kB
PageTables: 9828 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 49408788 kB
Committed_AS: 1691056 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 397584 kB
VmallocChunk: 34359310332 kB
Percpu: 33280 kB
HardwareCorrupted: 0 kB
AnonHugePages: 391168 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 137024 kB
DirectMap2M: 8251392 kB
DirectMap1G: 94371840 kB

Tks,

Cleber

Re: Failed to install Third node - Dynatrace Managed

Suryanto_1 — Fri, 08 Mar 2024 02:00:26 GMT

Not sure if its MemFree or MemAvailable we should be looking at but either case is still not enough

17065652 kB - MemFree
31970060 kB - MemAvailable

33285996 kB - Required by error

Native memory allocation (mmap) failed to map 33285996544 bytes for committing reserved memory.

SwapTotal: 0 kB
SwapFree: 0 kB

Also why is your swap 0. You may want to compare it with the other servers.

Re: Failed to install Third node - Dynatrace Managed

Mohamed_Hamdy — Fri, 08 Mar 2024 03:35:25 GMT

Hello @cleber_sanches ,

Try to increase MemAvailable, and make sure to check after rebooting the machine, also, the following link might be useful

https://stackoverflow.com/questions/48592602/native-memory-allocation-mmap-failed-to-map