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find . -name '@eaDir' -type d -print0 | xargs -0 rm -rfv

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Babun Tab Completion

If babun tab completion stops working, then do the following:

$ cd
$ compinit
$ cp .zcompdump .zcompdump-$HOSTNAME-$ZSH_VERSION

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Increasing replication factor for a topic

1. Create a custom reassignment plan (see attached file inc-replication-factor.json). In this case we are going from replication factor of 1 to 3.

2. Run Kafka partition reassignment script:

   kafka-reassign-partitions --zookeeper $ZOOKEEPER_CONNECT \
       --reassignment-json-file /home/liquidnt/inc-replication-factor.json  \
       --execute
   

3. Verify if the assignment was successful

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MacOS (Sierra) Recovery Disk

Prerequisites

USB drive with atleast 5 GB of storage

Steps

1. Download MacOS Sierra from the App Store (cancel out of the installation)
2. Open Finder and navigate to Applications directory

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curl --silent -H "User-Agent: sh-winkdex-app" "https://winkdex.com/api/v0/price" | jq .price/100

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Online Resources to Learn Free Monads

Videos

Composable application architecture with reasonably priced monads - Rúnar Bjarnason

Programs as Values - Rob Norris

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Downloading JDK

Using wget

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz

Using curl

curl -v -j -k -L -H "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz > jdk-7u79-linux-x64.tar.gz

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Remote VisualVM

Start RMI registry

$ rmiregistry -J-Djava.rmi.server.codebase=file:$JAVA_HOME/lib/tools.jar

Create Policy file for jstatd

• Create a file named jstatd.all.policy
• With the following contents:

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allprojects { project -> 

    configurations.all {
        resolutionStrategy {
            //... Fail eagerly on version conflict (includes transitive dependencies)
            //... For e.g. multiple different versions of the same dependency (group and name are equal)
            failOnVersionConflict()

             //... Force certain versions of dependencies (including transitive)
            force libraries.scala_library

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<logger name="scala.slick.jdbc.JdbcBackend.statement" level="DEBUG" />