Invalid data value log2

This page describes content that has been removed from Java Edition.

This feature was present in earlier versions of Java Edition, but has since been removed.

Invalid data value log2

Rarity tier	Common
Renewable	No
Stackable	Yes (64)

Invalid data value log2 refers to item forms of the secondary log block with damage values outside of the usual range which logs can usually be obtained in.

Obtaining

Without the use of commands, invalid data value log2 items are unobtainable in the last versions in which they existed without inheriting them from a prior version in which they were obtainable.

Only eight damage variants of the log2 block are currently known to be obtainable. Two of these correspond to existing species (0 for acacia and 1 for dark oak), with the other six being invalid data value variants. There is currently no known way to obtain log2 items with damage values of 6, 7, 10, 11, 12, 13, 14 or 15. Like with all other invalid data value items documented on this wiki, there is also no known way to obtain items with damage values 16 and above, nor -1 and below.

Transmutation

Block transmutation with arrows can be used to obtain log2 blocks with metadata 2 and 3. These blocks can be mined in 14w21b or earlier to obtain the item corresponding to these blocks. The initial block being transmuted must be an up/down-facing acacia log, i.e. a log2 block with metadata value 0. Dark oak logs, as well as rotated acacia logs, cannot be transmuted.

Breaking log2 blocks

In 14w25a, log2 blocks existing in the world will drop invalid data value log2 items when broken.^[1] Acacia logs will drop items with a damage value of 4, and dark oak logs will drop items with a damage value of 5.

In 14w25a and 14w25b, breaking log2 blocks with a Silk Touch enchanted tool will drop different invalid data value log2 items:^[2] acacia logs drop damage value 8, and dark oak logs drop damage value 9.

Invalid data value log blocks that exist in the world cannot be broken in 14w25a or 14w25b, as approaching a chunk containing them will crash the game in these two versions. They cannot be broken in 14w26a or later, as such versions treat invalid blocks as air.

Usage

Placement

From 13w43a to 14w21b, invalid data value log items will place the log corresponding to their species. The directionality of the item is ignored; the item will be placed as if it were a normal log item. This also means that "wood" items will place a log rather than wood.

Attempting to place any log, regardless of data value, will immediately crash the game in 14w25a.^[3]

From 14w25b to 17w46a, the pre-14w25a behavior can be seen again for items corresponding to acacia and dark oak. Items which instead correspond to the two unused species slots will cause the same crash as in 14w25a due to no valid species data being present.

Conversion to future versions

In 1.13 (17w47a) onwards, distinguishing between block and item variants using metadata and damage was formally abolished. As a result of this, existing items would be converted over to the new ID system automatically. Invalid data value log2 items behave anomalously in that instead of converting to their respective parent species, they all convert to acacia logs instead. In addition, items with data values 12 to 15, which represent wood rather than logs, still become logs.^[4]

History

Java Edition
1.7.2			13w43a				A second block ID is now used for two newly-implemented species of log. Invalid data variants exist as a consequence of how block and item metadata is handled.
							As a result of this, due to only two spots for species being taken, two more remain which are unfilled, resulting in invalid data values. These can be obtained via block transmutation and picked up.
							Log2 items with damage values 2 and above are named "Acacia Wood" regardless of the species they actually represent.
1.8			14w10a				The item forms of all invalid data value log2 blocks have changed; those corresponding to rotated logs now map textures correctly but the lighting behaves rotated as well, and the remaining unused variants now are 2D in item form.
							Log2 blocks in the world with metadata corresponding to unused species now have no model . The particles of said blocks are still that of the log they previously were.
			14w17a				Log2 items with damage values 2 and above are named "Oak Wood", despite oak wood being handled by a completely different block ID.
			14w25a				With the introduction of data-driven item models, any item with a data value outside of what is accepted by the game has no model to point to, resulting in use of the missing item model.
							Log2 blocks corresponding to the two empty species slots now cause the game to crash if approached. It is therefore impossible to interact with these blocks to obtain damage values 2 or 3, nor any potential higher damage values allowed by this snapshot.
							Log2 items with damage values 4 and 5 can be obtained by breaking acacia and dark oak logs in most cases, and damage values 8 and 9 can be obtained via the use of Silk Touch.
			14w25b				Log2 items with damage values 4 and 5 are no longer obtainable from normal breaking.
			14w26a				Log2 items with damage values 8 and 9 are no longer obtainable with Silk Touch tools.
			14w30a				Invalid data value log2 items, alongside other invalid data value items, now appear the size of a full block when held in third person or by another player or mob.
1.9			15w31a				The missing model's inventory appearance has changed, resulting in the appearance of invalid data value log2 items also changing.
							The items also appear the size of a full block when held in first person and when dropped on the ground, and also appear larger than before in an item frame.
1.13			17w43a				The missing texture has changed, resulting in the appearance of invalid data value log2 items also changing.
			17w47a				Numeric IDs for blocks and items have been completely removed from the game, with different species of logs being given their own string IDs. As a result, invalid data value log2 items have been "removed" as any such item now converts cleanly into acacia logs.

Inventory appearances (values marked in red are not known to be obtainable in survival mode)

From version		Damage value														Notes
		2	3	4	5	6	7	8	9	10	11	12	13	14	15
1.7.2	13w43a
	1.7															Logs have now been given unique inside textures, and acacia and dark oak log textures were redone.
1.8	14w10a															Logs appear properly rotated, however the lighting is also rotated. Truly invalid states are now 2D.
	14w10b															12-13 now appear 3D again.
	14w25a															Model no longer exists
1.9	15w31a															The missing model is no longer rotated or downscaled.
1.13	17w43a															The missing texture has changed.

Issues

Invalid data value log2 items are an issue, and due to their removal, can be considered already fixed.

References

External links

• Invalid Data Value Log2 at the Minecraft Discontinued Features wiki