eBugs in Cloud Systems created CASSANDRA-15118:
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Summary: OffHeapBitSet() throws a RuntimeException when it runs
out of memory
Key: CASSANDRA-15118
URL: https://issues.apache.org/jira/browse/CASSANDRA-15118
Project: Cassandra
Issue Type: Bug
Reporter: eBugs in Cloud Systems
Dear Cassandra developers, we are developing a tool to detect exception-related
bugs in Java. Our prototype has spotted the following {{throw}} statement whose
exception class and error message seem to indicate different error conditions.
Since we are not very familiar with Cassandra's internal work flow, could you
please help us verify if this is a bug, i.e., will the callers have trouble
handling the exception, and will the users/admins have trouble diagnosing the
failure?
Version: Cassandra-3.11 (commit: 123113f7b887370a248669ee0db6fdf13df0146e)
File: CASSANDRA-ROOT/src/java/org/apache/cassandra/utils/obs/OffHeapBitSet.java
Line: 49
{code:java}
throw new RuntimeException("Out of native memory occured, You can avoid it by
increasing the system ram space or by increasing
bloom_filter_fp_chance.");{code}
Reason: {{RuntimeException}} is usually used to represent errors in the program
logic (think of one of its subclasses, {{NullPointerException}}), while the
error message indicates that {{OffHeapBitSet()}} ran out of memory. Will this
mismatch be a problem? For example, will the callers miss the possibility that
{{OffHeapBitSet()}} can run out of memory? Or, will the callers try to handle
other {{RuntimeException}} accidentally (and incorrectly) handle the out of
memory scenario?
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