Java Application server crashing with null on Sun Solaris

I have a very old Sun Solaris Server running on on SPARC platform
# cat /etc/release
                       Solaris 10 6/06 s10s_u2wos_09a SPARC
           Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.
                        Use is subject to license terms.
                             Assembled 09 June 2006

Running an old java application server on it
$ asadmin version
Unable to communicate with admin server, getting version locally.
Version = Sun Java System Application Server Platform Edition 8.2
Command version executed successfully.

We had a planned power shut at our office so we needed to shut the servers down for few hours, after the shut down window, I started the servers - servers boot successfully but while starting the  application server i was getting output "null" the server even was not writing any logs to the server.log file

asadmin> start-domain
Starting Domain domain1, please wait.
Log redirected to /xyz/SUNWappserver/domains/domain1/logs/server.log.
null
$

It was a nightmare that I could not even get clue of the problem so that i can google and resolve, additionally not being an application and linux guy it only worsen the situation and it took me days to reach the at the unexpected root cause of the problem that was crashing the application and not allowing even to write logs.

The issue with application server was that it had exhausted inode limits of the file system. And I confirmed it with this command.

$ df -oi / 
Filesystem             iused   ifree  %iused  Mounted on
/dev/md/dsk/d0       2486848 0 100%   /

To resolve the issue off course I  needed to find the unwanted files and delete them to free up inode capacity for the file system. And for that my main target was all log folders in the servers. Exploring the log folders I found millions of small log files which were created since the server was installed and running for years.
After finding and deleting millions of log files in different log folders in the server (mainly in  /xyz/SUNWappserver/domains/domain1/logs and /var/logs) I reduced the inode usage below 30% and after that the applications was started like a charm.
During this troubleshooting I learnt importance of the backup and how to backup domain :-)

How to find out what VMTools version will come with ESXi

Before installing an VMWare ESXi server i was little curious that what VMTools version will come after the ESXi have been installed and any VM has been created.
Looking around found a link on VMWare worth to share and keep handy while working on the deployment of VMWare especially before upgrading and existing VMWare infrastructure to newer one you would like to know the VMTools version, its support with your Operating Systems in Guest OS and/or read upon open or resolved caveats by identifying the VMTools version prior the installation and choosing the right version for your environment.

Below information has been collected from the link here

# The ESXi server mapping is only to show that the particular version of
# Tools ships with that particular ESXi server build number, but the Tools
# can work with a greater range of ESXi versions.
#
# Column 1: Tools version on NGC/VI Client
# Column 2: ESXi server version.'esx/0.0' indicates that the tools version
# is not yet bundled with ESXi.
# Column 3: Tools version on guest Setup/About page
# Column 4: ESXi server build number
#
10287       esx/0.0      10.1.15
10282       esx/0.0      10.1.10
10279       esx/6.5u1    10.1.7        5969303
10277       esx/6.0p05   10.1.5        5572656
10272       esx/6.5p01   10.1.0        5146846
10272       esx/6.5      10.1.0        4564106
10252       esx/6.5      10.0.12       4564106
10249       esx/5.5p11   10.0.9        6480324
10249       esx/5.5ep11  10.0.9        5230635
10249       esx/6.0u3    10.0.9        5050593
10249       esx/5.5p10   10.0.9        4722766       
10249       esx/6.0p04   10.0.9        4600944
10249       esx/5.5p09   10.0.9        4345813
10249       esx/6.0p03   10.0.9        4192238
10249       esx/5.5p08   10.0.9        4179633
10248       esx/0.0      10.0.8
10246       esx/6.0u2    10.0.6        3620759
10245       esx/0.0      10.0.5
10240       esx/6.0ep05  10.0.0        3566359
10240       esx/6.0p02   10.0.0        3380124
10240       esx/5.5p07   10.0.0        3248547
10240       esx/5.5ep10  10.0.0        3568722
10240       esx/5.5ep09  10.0.0        3343343
9541        esx/6.0ep04  9.10.5        3247720
9541        esx/6.0u1    9.10.5        3029758
9537        esx/6.0p01   9.10.1        2809209
9536        esx/6.0      9.10.0        2494585
9359        esx/5.5ep08  9.4.15        3116895
9359        esx/5.5u3    9.4.15        3029944
9356        esx/5.5p05   9.4.12        2668677
9355        esx/5.5ep07  9.4.11        2638301
9355        esx/5.5ep06  9.4.11        2456374
9355        esx/5.5p04   9.4.11        2403361
9354        esx/5.5ep05  9.4.10        2143827
9354        esx/5.5p03   9.4.10        2143827
9354        esx/5.5u2    9.4.10        2068190
9350        esx/5.5p02   9.4.6         1892794
9349        esx/5.5ep04  9.4.5         1881737
9349        esx/5.5ep03  9.4.5         1746974
9349        esx/5.5ep02  9.4.5         1750340
9349        esx/5.5u1    9.4.5         1623387
9344        esx/5.5p01   9.4.0         1474528
9344        esx/5.5      9.4.0         1331820
9233        esx/5.1p09   9.0.17        3872664
9232        esx/5.1p08   9.0.16        3070626
9231        esx/5.1p07   9.0.15       2583090
9231        esx/5.1u3    9.0.15        2323236
9229        esx/5.1p06   9.0.13        2126665
9228        esx/5.1p05   9.0.12        1897911
9227        esx/5.1ep05  9.0.11        1900470
9227        esx/5.1p04   9.0.11        1743533
9226        esx/5.1ep04  9.0.10        1612806
9226        esx/5.1u2    9.0.10        1483097
9221        esx/5.1p03   9.0.5         1312873
9221        esx/5.1p02   9.0.5         1157734
9221        esx/5.1ep03  9.0.5         1117900
9221        esx/5.1u1    9.0.5         1065491
9217        esx/5.1ep02  9.0.1         1021289
9217        esx/5.1p01   9.0.1         914609
9216        esx/5.1      9.0.0         799733
8401        esx/5.0p13   8.6.17        3982828
8400        esx/5.0p12   8.6.16        3086167
8399        esx/5.0p11   8.6.15        2509828
8398        esx/5.0p10   8.6.14        2312428
8398        esx/5.0p09   8.6.14        1976090
8397        esx/5.0ep06  8.6.13        1918656
8397        esx/5.0p08   8.6.13        1851670
8396        esx/5.0p07   8.6.12        1489271
8395        esx/5.0u3    8.6.11        1311175
8395        esx/5.0p06   8.6.11        1254542
8395        esx/5.0ep05  8.6.11        1117897
8395        esx/5.0p05   8.6.11        1024429
8394        esx/5.0u2    8.6.10        914586
8397        esx/5.0p08   8.6.13        1739451
8389        esx/5.0p04   8.6.5         821926
8389        esx/5.0p03   8.6.5         768111
8389        esx/5.0u1    8.6.5         623860
8384        esx/5.0p02   8.6.0         515841
8384        esx/5.0p01   8.6.0         474610
8384        esx/5.0      8.6.0         469512
8307        esx/4.1p11   8.3.19
8307        esx/4.1p10   8.3.19
8307        esx/4.1p09   8.3.19
8307        esx/4.1p08   8.3.19
8306        esx/4.1p07   8.3.18
8305        esx/4.1p06   8.3.17
8305        esx/4.1u3    8.3.17
8300        esx/4.1p05   8.3.12
8300        esx/4.1p04   8.3.12
8300        esx/4.1u2    8.3.12
8295        esx/4.1p03   8.3.7
8295        esx/4.1u1    8.3.7
8290        esx/4.1      8.3.2
8199        esx/4.0p15   8.0.7
8199        esx/4.0p14   8.0.7
8198        esx/4.0p13   8.0.6
8197        esx/4.0ep09  8.0.5
8196        esx/4.0p12   8.0.4
8196        esx/4.0p11   8.0.4
8196        esx/4.0u4    8.0.4
8196        esx/4.0p10   8.0.4
8196        esx/4.0u3    8.0.4
8195        esx/4.0u2    8.0.3
8194        esx/4.0u1    8.0.2
8192        esx/4.0      8.0.0
7304        esx/3.5p27   7.4.8
7304        esx/3.5p25   7.4.8
7304        esx/3.5p24   7.4.8
7304        esx/3.5u5    7.4.8
7303        esx/3.5u4    7.4.7
7302        esx/3.5u3    7.4.6
7302        esx/3.5u2    7.4.6

Unable to Perform Image Update on the Adapter 2 Intel Corp UCSC-PCIE-ID10GF

While applying Service Profile to newly discovered UCS Rack Servers (UCSC-220M5L)  getting this error " Unable to Perform Image Update ...