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Posted to common-issues@hadoop.apache.org by "Sven Meys (JIRA)" <ji...@apache.org> on 2012/09/26 17:57:07 UTC
[jira] [Updated] (HADOOP-8853) BytesWritable setsize unchecked
[ https://issues.apache.org/jira/browse/HADOOP-8853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sven Meys updated HADOOP-8853:
------------------------------
Description:
When setting an array of length 1183230720 (in my case), the method will return a negative array index exception.
Cause is the following method.
public void setSize(int size) {
if (size > getCapacity()) {
setCapacity(size * 3 / 2);
}
this.size = size;
}
size * 3 has precedence which means that for any value greater than 715.827.882 (682,6 MB), the result will overflow and become negative. Thus this method is unsafe.
It would be nice to have this hidden feature documented or have a failsafe in place.
was:
When setting an array of length 1183230720 (in my case), the method will return a negative array index exception.
Cause is the following method.
public void setSize(int size) {
if (size > getCapacity()) {
setCapacity(size * 3 / 2);
}
this.size = size;
}
size * 3 has precedence which means that for any value greater than 715.827.882 (682,6 MB) this method is unsafe.
It would be nice to have this hidden feature documented or have a failsafe in place.
> BytesWritable setsize unchecked
> -------------------------------
>
> Key: HADOOP-8853
> URL: https://issues.apache.org/jira/browse/HADOOP-8853
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.1-alpha
> Reporter: Sven Meys
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> When setting an array of length 1183230720 (in my case), the method will return a negative array index exception.
> Cause is the following method.
> public void setSize(int size) {
> if (size > getCapacity()) {
> setCapacity(size * 3 / 2);
> }
> this.size = size;
> }
> size * 3 has precedence which means that for any value greater than 715.827.882 (682,6 MB), the result will overflow and become negative. Thus this method is unsafe.
> It would be nice to have this hidden feature documented or have a failsafe in place.
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