[jira] [Created] (CASSANDRA-7572) cassandra-env.sh fails to find Java version if JAVA_TOOL_OPTIONS in environment

["Gregory Ramsperger (JIRA)" <ji...@apache.org>]

Gregory Ramsperger created CASSANDRA-7572:
---------------------------------------------

             Summary: cassandra-env.sh fails to find Java version if JAVA_TOOL_OPTIONS in environment
                 Key: CASSANDRA-7572
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7572
             Project: Cassandra
          Issue Type: Bug
          Components: Config
         Environment: Linux/darwin/etc
            Reporter: Gregory Ramsperger


Parsing of Java version is done in cassandra-env.sh via
{code}
java_ver_output=`"${JAVA:-java}" -version 2>&1`

jvmver=`echo "$java_ver_output" | awk -F'"' 'NR==1 {print $2}'`
{code}

This fails if the first line of output from `java -version` does not contain the version. When JAVA_TOOL_OPTIONS is set as the output is
{quote}
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
java version "1.7.0_40"
Java(TM) SE Runtime Environment (build 1.7.0_40-b43)
Java HotSpot(TM) 64-Bit Server VM (build 24.0-b56, mixed mode)
{quote}

Parsing this is not guaranteed to work as there is no contract for this output. The recommended way of dealing with this is via a Java application (which will have access to each of these pieces).

If you want to keep with this model of doing things, you can apply a very small but hacky patch:
{code}
-jvmver=`echo "$java_ver_output" | awk -F'"' 'NR==1 {print $2}'`
+jvmver=`echo "$java_ver_output" | grep 'java version' | awk -F'"' 'NR==1 {print $2}'`
 JVM_VERSION=${jvmver%_*}
 JVM_PATCH_VERSION=${jvmver#*_}

@@ -100,7 +100,7 @@
 fi


-jvm=`echo "$java_ver_output" | awk 'NR==2 {print $1}'`
+jvm=`echo "$java_ver_output" | grep -A 1 'java version' | awk 'NR==2 {print $1}'`
 case "$jvm" in
     OpenJDK)
{code}


Otherwise, you need to write a java app, compiled for older versions, that returns this data via the java.specification.version and a combination of java.vm.name and java.vm.vendor.



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