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From Abhishek Kumar Maheshwari <Abhishek.Maheshw...@timesinternet.in>
Subject RE: [Cassandra 3.0.9] Cannot allocate memory
Date Wed, 22 Mar 2017 22:04:42 GMT
Hi Abhishek,

In sysctl.conf file we have below setting:

vm.swappiness = 10
vm.dirty_ratio = 60
vm.dirty_background_ratio = 2
vm.max_map_count = 1048575

so I need to apply patch for same?

From: Abhishek Verma [mailto:verma@uber.com]
Sent: 22 March 2017 23:04
To: user@cassandra.apache.org
Cc: Abhishek Kumar Maheshwari <Abhishek.Maheshwari@timesinternet.in>
Subject: Re: [Cassandra 3.0.9] Cannot allocate memory

Just a shot in the dark, but what is your setting of vm.max_map_count in /etc/sysctl.conf
?

It is recommended to set it to:
vm.max_map_count = 1048575

Source: https://docs.datastax.com/en/landing_page/doc/landing_page/recommendedSettingsLinux.html

We saw a similar problem in the past where mmap failed and we added a check to emit warning
as a part of https://issues.apache.org/jira/browse/CASSANDRA-13008.


On Wed, Mar 22, 2017 at 9:57 AM, Thakrar, Jayesh <jthakrar@conversantmedia.com<mailto:jthakrar@conversantmedia.com>>
wrote:
Is/are the Cassandra server(s) shared?
E.g. do they run mesos + spark?

From: Abhishek Kumar Maheshwari <Abhishek.Maheshwari@timesinternet.in<mailto:Abhishek.Maheshwari@timesinternet.in>>
Date: Wednesday, March 22, 2017 at 12:45 AM
To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>>
Subject: [Cassandra 3.0.9] Cannot allocate memory

Hi all,

I am using Cassandra 3.0.9. while I am adding new server after some time I am getting below
exception. JVM option is attaches.
Hardware info:
Ram 64 GB.
Core: 40


Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007fe9c44ee000, 12288,
0) failed; error='Cannot allocate memory' (errno=12)
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 12288 bytes for committing reserved memory.
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007f5c056ab000, 12288,
0) failed; error='Cannot allocate memory' (errno=12)
[thread 140033204860672 also had an error]
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007f5c0566a000, 12288,
0) failed; error='Cannot allocate memory' (errno=12)
[thread 140033204594432 also had an error]Java HotSpot(TM) 64-Bit Server VM warning:
INFO: os::commit_memory(0x00007fe9c420c000, 12288, 0) failed; error='Cannot allocate memory'
(errno=12)
Java HotSpot(TM) 64-Bit Server VM warning: [thread 140641994852096 also had an error]INFO:
os::commit_memory(0x00007f5c055a7000, 12288, 0) failed; error='Cannot allocate memory' (errno=12)

Please let me know what I miss?

Thanks & Regards,
Abhishek Kumar Maheshwari
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