cjdaly / napkin Goto Github PK

Starting with a fresh ubuntu 13.06 image on the Cubieboard2, I used the hflt variant of the Oracle 7 JRE. I did not install libc6-armel or libsfgcc1, but generally followed other cubie2 setup steps.

Running java -version produces:

java version "1.7.0_45"
Java(TM) SE Embedded Runtime Environment (build 1.7.0_45-b15, headless)
Java HotSpot(TM) Embedded Server VM (build 24.45-b08, mixed mode)

Things seem more or less ok, but JRuby gives some bizarre results.

Got some ideas from the discussion here.

Running jruby -v -e 'puts "#{Process.pid}"' & shows the process ID returned from bash (from backgrounding the process) does not match the pid from ruby.

Running jruby -v -w -rffi -e 'p FFI::Platform::ARCH' produces:

LoadError: Could not load FFI Provider: (NotImplementedError) FFI not available: null
See http://jira.codehaus.org/browse/JRUBY-4583
require at org/jruby/RubyKernel.java:1082
...

Tried this: apt-get install -y libffi6 but it was already installed.

Tried this: apt-get install -y libjffi-java but it didn't seem to make a difference.

The Neo4j DB crashed today on pcduino-1.

/neo4j/neo4j-community-1.8.2/data/log/console.log has this:
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (os_linux_zero.cpp:270), pid=924, tid=1722283120
# fatal error: caught unhandled signal 11
#
# JRE version: 6.0_27-b27
# Java VM: OpenJDK Zero VM (20.0-b12 mixed mode linux-arm )
# Derivative: IcedTea6 1.12.3
# Distribution: Ubuntu 12.04 LTS, package 6b27-1.12.3-0ubuntu112.04.1
# An error report file with more information is saved as:
# /home/ubuntu/neo4j/neo4j-community-1.8.2/hs_err_pid924.log
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
# https://bugs.launchpad.net/ubuntu/+source/openjdk-6/

This seems like an issue with the jdk implementation (from the setup steps: apt-get install default-jdk). The console.log also has this warning (shows every time Neo4j starts):
org.neo4j.server.CommunityBootstrapper WARNING: WARNING! You are using an unsupported Java runtime. Please use Oracle(R) Java(TM) Runtime Environment 6.

Some searching turned up these related links:

• http://www.raspberrypi.org/phpBB3/viewtopic.php?t=27805&p=280770
• http://pcduino.com/forum/index.php?topic=3634.0

After the initial adoption of Neo4j 2.0 M6, napkin ran on a BBB for several days with no problems. Next I began using labels in cypher for just one property index. This change caused breakage within a day. Neo4j was still responsive, but the log is full of errors like this:

org.neo4j.graphdb.TransactionFailureException: Unable to commit transaction
...
Caused by: java.io.IOException: Tx start for same xid[GlobalId[NEOKERNL|-4625259938496542804|63100], BranchId[ ]] found twice
...

full crash log: https://gist.github.com/cjdaly/7227713