What does "debug? true; trace :10" mean?

Heres my log:

Last login: Thu Dec 29 14:49:54 on ttys000
/Users/Jun/Desktop/bukkit/server.command ; exit;
jun-oikawa-no-macbook-pro:~ Jun$ /Users/Jun/Desktop/bukkit/server.command ; exit;
174 recipes
27 achievements
15:29:24 [???] Starting minecraft server version 1.0.0
15:29:24 [???] Loading properties
15:29:24 [???] Starting Minecraft server on 5.2.145.101:25565
15:29:24 [???] This server is running Craftbukkit version git-Bukkit-1.8.1-R4-13-g342948e-b1488jnks (MC: 1.0.0) (Implementing API version 1.0.0-R1-SNAPSHOT)
15:29:25 [???] MLog clients using java 1.4+ standard logging.
15:29:25 [???] Preparing level "world"
15:29:25 [???] Default game type: 0
15:29:25 [???] Preparing start region for level 0 (Seed: 5111684036066281219)
15:29:26 [???] Preparing spawn area: 48%
15:29:26 [???] Preparing start region for level 1 (Seed: 8399037265291133759)
15:29:27 [???] Preparing spawn area: 28%
15:29:28 [???] Preparing start region for level 2 (Seed: 8399037265291133759)
15:29:28 [???] Preparing spawn area: 16%
15:29:29 [???] Bukkit version format changed. Version not checked.
15:29:29 [???] Loaded Essentials build 2.6.5 by: Zenexer, ementalo, Aelux, Brettflan, KimKandor, snowleo, ceulemans, Xeology, KHobbits
15:29:29 [???] Essentials: Using config based permissions. Enable superperms in config.
15:29:29 [???] Loaded EssentialsChat build 2.6.5 by: essentials team
15:29:29 [???] Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]
15:29:29 [???] Loaded EssentialsProtect build 2.6.5 by: essentials team
15:29:29 [???] Loaded EssentialsSpawn build 2.6.5 by: essentials team
15:29:29 [???] [Gallows] Permission system not detected. Attempting to use server permissions and defaulting to OP...
15:29:29 [???] [Gallows] Version 0.13 is enabled!
15:29:29 [???] [MobDisguise] by desmin88 version 1.65 enabled.
15:29:29 [???] WorldEdit 5.0 enabled.
15:29:29 [???] WEPIF: Using the Bukkit Permissions API.
15:29:30 [???] WEPIF: Using the Bukkit Permissions API.
15:29:30 [???] WEPIF: Using the Bukkit Permissions API.
15:29:30 [???] WorldGuard: (world) Single session is enforced.
15:29:30 [???] WorldGuard: (world) TNT ignition is PERMITTED.
15:29:30 [???] WorldGuard: (world) Lighters are PERMITTED.
15:29:30 [???] WorldGuard: (world) Lava fire is blocked.
15:29:30 [???] WorldGuard: (world) Fire spread is UNRESTRICTED.
15:29:30 [???] WorldGuard: Loaded configuration for world 'world"
15:29:30 [???] WorldGuard: (world_nether) Single session is enforced.
15:29:30 [???] WorldGuard: (world_nether) TNT ignition is PERMITTED.
15:29:30 [???] WorldGuard: (world_nether) Lighters are PERMITTED.
15:29:30 [???] WorldGuard: (world_nether) Lava fire is blocked.
15:29:30 [???] WorldGuard: (world_nether) Fire spread is UNRESTRICTED.
15:29:30 [???] WorldGuard: Loaded configuration for world 'world_nether"
15:29:30 [???] WorldGuard: (world_the_end) Single session is enforced.
15:29:30 [???] WorldGuard: (world_the_end) TNT ignition is PERMITTED.
15:29:30 [???] WorldGuard: (world_the_end) Lighters are PERMITTED.
15:29:30 [???] WorldGuard: (world_the_end) Lava fire is blocked.
15:29:30 [???] WorldGuard: (world_the_end) Fire spread is UNRESTRICTED.
15:29:30 [???] WorldGuard: Loaded configuration for world 'world_the_end"
15:29:30 [???] WorldGuard: 1 regions loaded for 'world'
15:29:30 [???] WorldGuard: 0 regions loaded for 'world_nether'
15:29:30 [???] WorldGuard: 0 regions loaded for 'world_the_end'
15:29:30 [???] WorldGuard 5.4 enabled.
15:29:30 [???] [mcMMO] Using Bukkit Permissions.
15:29:30 [???] Loading Config File...
15:29:31 [???] mcMMO version 1.2.07 is enabled!
15:29:31 [???] Server permissions file permissions.yml is empty, ignoring it
15:29:31 [???] Done (0.676s)! For help, type "help" or "?"


And heres my problem. My server is a bukkit, i use a mac, and i want to know what this means;

15:29:29 [???] Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]

After i logged in, i found my building broken with tnt(?) or something. Maybe its a griefer; but maybe this does something to do with it. Can anyone explain to me what this means plz?