Access Denied while starting elastic search

Elastic Stack Elasticsearch
1

Hi,
My elasticsearch-6.4.2 instance was running successfully on Windows 7, until yesterday before I shutdown the windows without shutting down the elastic search instance that was running. Now I am getting 'Access is denied' while trying to start elastic search by running elasticsearch.bat. I am fairly new to it. Any help will be appreciated.

Thanks

2

Posting the full error, in text, would be ideal.

3

This is what I can find from the bitdefender which is blocking the running
On-Access scanning has detected an execution of a malicious command line. The process
C:\Program Files\Java\jdk1.8.0_101\bin\java.exe was blocked because of the execution of a malicious command line
-Xms1g -Xmx1g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly -XX:+AlwaysPreTouch -Xss1m -Djava.awt.headless=true -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=C:\Users<user_name>\AppData\Local\Temp\elasticsearch
-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=data
-XX:ErrorFile=logs/hs_err_pid%p.log -XX:+PrintGCDetails
-XX:+PrintGCDateStamps -XX:+PrintTenuringDistribution
-XX:+PrintGCApplicationStoppedTime -Xloggc:logs/gc.log
-XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=32
-XX:GCLogFileSize=64m
-Delasticsearch
-Des.path.home="C:\elasticsearch-6.4.2"
-Des.path.conf="C:\elasticsearch-6.4.2\config"
-Des.distribution.flavor="default"
-Des.distribution.type="zip"
-cp "C:\elasticsearch-6.4.2\lib*" "org.elasticsearch.bootstrap.Elasticsearc

4

It sounds like this is a problem with your Bitdefender installation. You should configure it to permit Elasticsearch to run.

5

Digging deeper I found bitdefender is blocking the running of elastic search due the system property
-Dio.netty.recycler.maxCapacityPerThread=0
So I had to comment it on jvm.options under the config folder to make it to run.
is there any severe impact on commenting this property?
Thanks

6

It does not sound like a good idea. Your cluster stability may suffer. We do not test this configuration, so it isn't supported. I have linked the discussion around why it was introduced below. The correct thing to do is to fix bitdefender to permit this setting.