Installing neo4j in openshift - neo4j

Question

While I run sh neo4j console inside the /neo4j/versions/2.1/neo4j-2.1/bin. I get the following error:
WARNING: Max 16384 open files allowed, minimum of 40 000 recommended. See the Neo4j manual.
Starting Neo4j Server console-mode...
Using additional JVM arguments: -server -XX:+DisableExplicitGC -Dorg.neo4j.server.properties=conf/neo4j-server.properties -Djava.util.logging.config.file=conf/logging.properties -Dlog4j.configuration=file:conf/log4j.properties -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:-OmitStackTraceInFastThrow
2015-11-29 11:58:24.427+0000 INFO [API] Setting startup timeout to: 120000ms based on -1
Exception in thread "main" org.apache.commons.configuration.ConversionException: 'org.neo4j.server.webserver.port' doesn't map to an Integer object
at org.apache.commons.configuration.AbstractConfiguration.getInteger(AbstractConfiguration.java:845)
at org.apache.commons.configuration.AbstractConfiguration.getInt(AbstractConfiguration.java:819)
at org.neo4j.server.Bootstrapper.webServerPort(Bootstrapper.java:239)
at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:130)
at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:63)
Caused by: org.apache.commons.configuration.ConversionException: Could not convert "${OPENSHIFT_NEO4J_DB_PORT}" to java.lang.Integer
at org.apache.commons.configuration.PropertyConverter.toNumber(PropertyConverter.java:413)
at org.apache.commons.configuration.PropertyConverter.toInteger(PropertyConverter.java:260)
at org.apache.commons.configuration.AbstractConfiguration.getInteger(AbstractConfiguration.java:841)
... 4 more
Caused by: java.lang.NumberFormatException: For input string: ""${OPENSHIFT_NEO4J_DB_PORT}""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:481)
at java.lang.Integer.<init>(Integer.java:677)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.commons.configuration.PropertyConverter.toNumber(PropertyConverter.java:409)
... 6 more

Answer 1

It seems you put in a shell variable Caused by: java.lang.NumberFormatException: For input string: ""${OPENSHIFT_NEO4J_DB_PORT}""
in Neo4j's neo4j-server.properties which is not supported.
Try to modify your config script to rather replace the port inline in the config file, like this:
sed -i -e "s|org.neo4j.server.webserver.port=.*|org.neo4j.server.webserver.port=${OPENSHIFT_NEO4J_DB_PORT}|g" $NEO4J_HOME/conf/neo4j-server.properties

Answer 2

Seems like you've hit the max files limit. This article talks about it in relation to Neo4j:
Neo4j WARNING: Max 1024 open files allowed, minimum of 40 000 recommended. See the Neo4j manual
Specifically you would up the numbers in /etc/security/limits.conf. You may need to restart.
This seems to be possible on OpenShift:
https://forums.openshift.com/how-to-increase-the-open-file-limit-on-as7-instance