[jira] [Created] (HBASE-28487) Division by zero encountered when using BloomFilter with a misconfiguration

["ConfX (Jira)" <ji...@apache.org>]

ConfX created HBASE-28487:
-----------------------------

             Summary: Division by zero encountered when using BloomFilter with a misconfiguration
                 Key: HBASE-28487
                 URL: https://issues.apache.org/jira/browse/HBASE-28487
             Project: HBase
          Issue Type: Bug
            Reporter: ConfX


h2. What happened:

Got Division by 0 when trying to run org.apache.hadoop.hbase.procedure2.store.region.TestHFileProcedurePrettyPrinter#test with io.storefile.bloom.max.fold set too large.
h2. Buggy code:

In BloomFilterUtil.java:
{code:java}
  public static int optimalFunctionCount(int maxKeys, long bitSize) {
    long i = bitSize / maxKeys; // here maxKeys might be zero
    ...
  }
{code}
h2. StackTrace:
{code:java}
org.apache.hadoop.hbase.DroppedSnapshotException: region: master:store,,1.1595e783b53d99cd5eef43b6debb2682.
…
Caused by: java.lang.ArithmeticException: / by zero
	at org.apache.hadoop.hbase.util.BloomFilterUtil.optimalFunctionCount(BloomFilterUtil.java:143)
	at org.apache.hadoop.hbase.util.BloomFilterUtil.createBySize(BloomFilterUtil.java:167){code}
h2. How to reproduce:

(1) Set io.storefile.bloom.max.fold to 73830463
(2) Run test: org.apache.hadoop.hbase.procedure2.store.region.TestHFileProcedurePrettyPrinter#test



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