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BDB JE 7.3.7 and Azul Zulu.

904507Apr 26 2017 — edited Jun 1 2017

Hi,

I was trying to use BDB JE 7.3.7 with Azul Zulu (based on OpenJDK) and it fails to start with the following error message :

The database environment could not be opened: java.lang.IllegalStateException: Could not access Zing management bean. Make sure -XX:+UseZingMXBeans was specified.

Looking at the code, in src/com/sleepycat/je/utilint/JVMSystemUtils.java, I see that the Zing JVM is detected uniquely based on the java.vendor property. But Azul Systems now produces 2 JVMs.

A possible solution is to change the code has below:

--- a/src/com/sleepycat/je/utilint/JVMSystemUtils.java

+++ b/src/com/sleepycat/je/utilint/JVMSystemUtils.java

@@ -22,7 +22,8 @@ import java.util.List;

public class JVMSystemUtils {

     public static final boolean ZING_JVM =

-        "Azul Systems, Inc.".equals(System.getProperty("java.vendor"));

+        "Azul Systems, Inc.".equals(System.getProperty("java.vendor")) &&

+        !System.getProperty("java.runtime.name").startsWith("OpenJDK");

     /**

      * Zing will bump the heap up to 1 GB if -Xmx is smaller.

Alternately, you could check that the java.runtime.name property contains the string "zing" (although I don't know the exact string for the Zing runtime name).

Thanks.

Ludo

Comments

Solomon Yakobson
Answer 
select  to_char(trunc(entry_date,'MM'),'MM YYYY),
        sum(qty) qty
  from  your_table_name
  group by trunc(entry_date,'MM')
  order by trunc(entry_date,'MM')
/

SY.

Marked as Answer by SANPAT · Aug 9 2022
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Locked on Jun 29 2017
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