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# Apache Hadoop Changelog

## Release 1.0.4 - 2012-10-12

### INCOMPATIBLE CHANGES:

| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |


### IMPORTANT ISSUES:

| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |


### NEW FEATURES:

| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HADOOP-7154](https://issues.apache.org/jira/browse/HADOOP-7154) | Should set MALLOC\_ARENA\_MAX in hadoop-config.sh |  Minor | scripts | Todd Lipcon | Todd Lipcon |


### BUG FIXES:

| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |
| [HDFS-3652](https://issues.apache.org/jira/browse/HDFS-3652) | 1.x: FSEditLog failure removes the wrong edit stream when storage dirs have same name |  Blocker | namenode | Todd Lipcon | Todd Lipcon |
| [MAPREDUCE-4399](https://issues.apache.org/jira/browse/MAPREDUCE-4399) | Fix performance regression in shuffle |  Major | performance, tasktracker | Luke Lu | Luke Lu |


### TESTS:

| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |


### SUB-TASKS:

| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |


### OTHER:

| JIRA | Summary | Priority | Component | Reporter | Contributor |
|:---- |:---- | :--- |:---- |:---- |:---- |


