Errata

In Figure 2-5 it lists "Namecode (Active)" and "Namecode (Standby)" instead of Namenode

I believe "developers writing client applications need to concern themselves with" should be "developers writing client application needn't concern themselves with".

The resource management aspect of the jobtracker is run as a new daemon called the resource manager,; a separate daemon responsible for creating and allocating resources to multiple applications.

Note:
Rather than two semicolons, it is a comma followed by a semicolon. It should be a single semicolon.

Text at top of page 73 refers to "forty-eight 48-port 1GbE leaf switches" handling 2,304 hosts in Figure 4-6.

Figure 4-6 labels (left-hand side of diagram) depict 24 leaf switches and 1,152 hosts.

Possibly a simple cut/paste of the labels from Figure 4-5 (previous page).

In the sentence:

"Loggers output their log events to an appender which is responsible to handling the event in some meaningful way."

- the word "to" should be replaced with "for".

Text in dfs.data.dir section (line 3) reads "also a comma separate list" -- should read "also a comma separated list"

In dfs.datanode.failed.volumes.tolerated section, paragraph 2, line 6 reads: "should be invested immediately" ... should read "should be investigated immediately"

Under the section titled dfs.datanode.failed.volumes.tolerated, the sentence:

"This leaves only the case where all disks fail in relatively rapid succession; an anomalous situation that should be invested immediately"

The word "invested" should be replaced with "investigated".

The sentence:

"The easiest way to accomplish this is to ensure that the uid of the user the namenode process run as is the same on all namenodes"

Should that actually say: "runs as is the same on all namenodes" instead of "run as is the same on all namenodes"?

Bold section title reads "Initialzing ZooKeeper State" instead of "Initializing"

In first paragraph after log output, text reads "the failover over controller" -- strike extra "over" so text reads "the failover controller"

"... commonly overridden at the job level based on the user's priori knowledge of the data or the work being performed."

extra "i" at the end of prior.

Line 2, use of "discreet" ought to be changed to "discrete" assuming that the desired meaning is "distinct." This condition exists elsewhere, too; distinct might be a more clear word choice.

KDC is defined in paragraph 3 (just below Table 6-1), but the acronym is used previously in paragraph 2 (3rd from last line).

3rd sentence in Configuring Hadoop Security, "at the time of this book" -> "at the time of publication"

Last paragraph on page, 3rd sentence: "primary three" -> "three primary"

Last paragraph, "strategies that effect durability" reads like a verb is desired, ought to be changed to "strategies that affect durability"

First paragraph of Tying It Together, 2nd to last sentence: "there are few things ONE can do"; recommend changing "one" to more informal "you" to fit the tone of the rest of the section.

"Pools can a have a weight that is only considered during fair share allocation"

Grammer/typo around "can a have", no a

2nd paragraph, 2nd sentence:

"... although capacity is still distributed appropriate across queues."

appropriately is missing the "ly" on the end.

"with the most starved queues receive slots first" ; change receive to receiving.

In the middle of the 2nd paragraph

"Bear in mind..."

should be

"Bare in mind..."

"We'll use this approach to diagnosing problems encountered": change "diagnosing" to "diagnose"

"sufficient capacity on one of [the] power distribution units": missing "the"

"maintaining health clusters" -> change health to "healthy"

In the last sentence / paragraph on this page, the word "health" should actually be "healthy"

"Beyond Hadoop proper, operating system misconfiguration is an equal source of pain in maintaining health clusters."

Under the section entitled "Hardware Failures", there is a typo in that mean time to failure is given the incorrect acronym MTTR; this should be MTTF.

3rd last sentence:

"Each change should be evaluated in the context of the likelihood that the given problem would repeat in the future, or if it were truly annomolous."

Spelling mistake, I believe it should be spelled "anomalous"

Bold term MericsSink should be MetricsSink.

"lower than a acceptable threshold": change "a" to "an"

use of "discreet" ought to be changed to "discrete" assuming that the desired meaning is "distinct." This condition exists elsewhere, too; distinct might be a more clear word choice.

use of "discreet" ought to be changed to "discrete" assuming that the desired meaning is "distinct." This condition exists elsewhere, too; distinct might be a more clear word choice.

use of "discreet" ought to be changed to "discrete" assuming that the desired meaning is "distinct." This condition exists elsewhere, too; distinct might be a more clear word choice.

Typos:

"effect a state transition" should be "affect a state transition"

"destablizing" should be "destabilizing"