nicktelford

test_connect:
    if (connect(ptr->fd,
                (struct sockaddr *)&servAddr,
                sizeof(servAddr)) < 0)
    {
      switch (errno)
      {
      case EINPROGRESS:
      case EALREADY:
      case EINTR:

nicktelford

log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: /usr/lib/hadoop-0.20/logs (Is a directory)
	at java.io.FileOutputStream.openAppend(Native Method)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:177)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:102)
	at org.apache.log4j.FileAppender.setFile(FileAppender.java:290)
	at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:164)
	at org.apache.log4j.DailyRollingFileAppender.activateOptions(DailyRollingFileAppender.java:216)
	at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:257)
	at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:133)

nicktelford

$ free -m
             total       used       free     shared    buffers     cached
Mem:          3017       2953         64          0        381        671
-/+ buffers/cache:       1899       1118
                                      ^
Available memory (in MB) -------------|

The Linux kernel will allocate as much free memory as possible to buffers and caches (e.g. the fs cache)
to improve performance. When an application allocates more memory than is "free", the kernel will allocate
memory from it's caches.

nicktelford

<?php
interface Comparable
{
  public function compare(self $obj);
}

class A implements Comparable
{
  public function compare(self $obj) {
    return $this == $obj;