[jira] [Created] (HBASE-11279) Block cache could be disabled by mistake

["Jimmy Xiang (JIRA)" <ji...@apache.org>]

Jimmy Xiang created HBASE-11279:
-----------------------------------

             Summary: Block cache could be disabled by mistake
                 Key: HBASE-11279
                 URL: https://issues.apache.org/jira/browse/HBASE-11279
             Project: HBase
          Issue Type: Bug
            Reporter: Jimmy Xiang
            Assignee: Jimmy Xiang


There is a weird test failure:

{noformat}
java.lang.AssertionError
	at org.junit.Assert.fail(Assert.java:86)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.junit.Assert.assertTrue(Assert.java:52)
	at org.apache.hadoop.hbase.io.hfile.TestPrefetch.readStoreFile(TestPrefetch.java:96)
	at org.apache.hadoop.hbase.io.hfile.TestPrefetch.testPrefetch(TestPrefetch.java:66)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
{noformat}

Looked into it, and found it could be because CacheConfig tries to compare a float with a long. Probably we should do this instead:

{noformat}
-    if (cachePercentage == 0L) {
+    if (cachePercentage <= 0.0001f) {
{noformat}



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