[
https://issues.apache.org/jira/browse/HBASE-28451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ConfX updated HBASE-28451:
--------------------------
Description:
*1. What happened*
After setting `hfile.block.cache.policy=AdaptiveLRU`, running test
`org.apache.hadoop.hbase.io.hfile.TestCacheConfig#testBucketCacheConfigL1L2Setup`
results in a casting error.
*2. Where's the problem*
In line 64 of `PooledRemoteClient`:
```java
FirstLevelBlockCache lbc = cbc.l1Cache;
...
// Force evictions by putting in a block too big.
final long justTooBigSize = ((LruBlockCache) lbc).acceptableSize() + 1;
```
However, lbc does not necessarily need to be a LruBlockCache, leading to a
potential `ClassCastException`
*3. How to reproduce*
1. set `hfile.block.cache.policy` to `AdaptiveLRU `
2. run
`org.apache.hadoop.hbase.io.hfile.TestCacheConfig#testBucketCacheConfigL1L2Setup`
you should observe
```
java.lang.ClassCastException: class
org.apache.hadoop.hbase.io.hfile.LruAdaptiveBlockCache cannot be cast to class
org.apache.hadoop.hbase.io.hfile.LruBlockCache
(org.apache.hadoop.hbase.io.hfile.LruAdaptiveBlockCache and
org.apache.hadoop.hbase.io.hfile.LruBlockCache are in unnamed module of loader
'app')
at
org.apache.hadoop.hbase.io.hfile.TestCacheConfig.testBucketCacheConfigL1L2Setup(TestCacheConfig.java:342)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
```
was:
## What happened
After setting `hfile.block.cache.policy=AdaptiveLRU`, running test
`org.apache.hadoop.hbase.io.hfile.TestCacheConfig#testBucketCacheConfigL1L2Setup`
results in a casting error.
## Where's the problem
In line 64 of `PooledRemoteClient`:
```java
FirstLevelBlockCache lbc = cbc.l1Cache;
...
// Force evictions by putting in a block too big.
final long justTooBigSize = ((LruBlockCache) lbc).acceptableSize() + 1;
```
However, lbc does not necessarily need to be a LruBlockCache, leading to a
potential `ClassCastException`
## How to reproduce
1. set `hfile.block.cache.policy` to `AdaptiveLRU `
2. run
`org.apache.hadoop.hbase.io.hfile.TestCacheConfig#testBucketCacheConfigL1L2Setup`
you should observe
```
java.lang.ClassCastException: class
org.apache.hadoop.hbase.io.hfile.LruAdaptiveBlockCache cannot be cast to class
org.apache.hadoop.hbase.io.hfile.LruBlockCache
(org.apache.hadoop.hbase.io.hfile.LruAdaptiveBlockCache and
org.apache.hadoop.hbase.io.hfile.LruBlockCache are in unnamed module of loader
'app')
at
org.apache.hadoop.hbase.io.hfile.TestCacheConfig.testBucketCacheConfigL1L2Setup(TestCacheConfig.java:342)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
```
> Cast without checking in TestCacheConfig
> ----------------------------------------
>
> Key: HBASE-28451
> URL: https://issues.apache.org/jira/browse/HBASE-28451
> Project: HBase
> Issue Type: Bug
> Reporter: ConfX
> Priority: Major
>
> *1. What happened*
> After setting `hfile.block.cache.policy=AdaptiveLRU`, running test
> `org.apache.hadoop.hbase.io.hfile.TestCacheConfig#testBucketCacheConfigL1L2Setup`
> results in a casting error.
>
> *2. Where's the problem*
> In line 64 of `PooledRemoteClient`:
> ```java
> FirstLevelBlockCache lbc = cbc.l1Cache;
> ...
> // Force evictions by putting in a block too big.
> final long justTooBigSize = ((LruBlockCache) lbc).acceptableSize() + 1;
> ```
> However, lbc does not necessarily need to be a LruBlockCache, leading to a
> potential `ClassCastException`
>
> *3. How to reproduce*
> 1. set `hfile.block.cache.policy` to `AdaptiveLRU `
> 2. run
> `org.apache.hadoop.hbase.io.hfile.TestCacheConfig#testBucketCacheConfigL1L2Setup`
> you should observe
> ```
> java.lang.ClassCastException: class
> org.apache.hadoop.hbase.io.hfile.LruAdaptiveBlockCache cannot be cast to
> class org.apache.hadoop.hbase.io.hfile.LruBlockCache
> (org.apache.hadoop.hbase.io.hfile.LruAdaptiveBlockCache and
> org.apache.hadoop.hbase.io.hfile.LruBlockCache are in unnamed module of
> loader 'app')
> at
> org.apache.hadoop.hbase.io.hfile.TestCacheConfig.testBucketCacheConfigL1L2Setup(TestCacheConfig.java:342)
> at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> ```
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