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Startup scripts: verify Java 8 (exactly), improve port/java verification messages. (#8794)

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* Startup scripts: verify Java 8 (exactly), improve port/java verification messages.

Java 11 compatibility isn't fully baked yet (users have reported various
issues on Java 11), so block startup with an error message unless Java 8
is found. Allow overriding this decision with an environment variable.

* Message adjustments.
This commit is contained in:
Gian Merlino 2019-10-30 22:37:05 -07:00 committed by Clint Wylie
parent bca649e492
commit edb3b00d26
2 changed files with 50 additions and 8 deletions
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26
examples/bin/verify-default-ports
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@ -21,12 +21,32 @@ use strict;
use warnings;
use Socket;
my @ports = (1527, 2181, 8081, 8082, 8083, 8090, 8091, 8200, 9095);
my $skip_var = $ENV{'DRUID_SKIP_PORT_CHECK'};
if ($skip_var && $skip_var ne "0" && $skip_var ne "false" && $skip_var ne "f") {
exit 0;
}
my @ports = (1527, 2181, 8081, 8082, 8083, 8090, 8091, 8200, 8888);
my $tcp = getprotobyname("tcp");
for my $port (@ports) {
socket(my $sock, PF_INET, SOCK_STREAM, $tcp) or die "socket: $!";
setsockopt($sock, SOL_SOCKET, SO_REUSEADDR, pack("l", 1)) or die "setsockopt: $!";
bind($sock, sockaddr_in($port, INADDR_ANY)) or die "Cannot start up because port[$port] is already in use.\n";
close $sock;
if (!bind($sock, sockaddr_in($port, INADDR_ANY))) {
print STDERR <<"EOT";
Cannot start up because port $port is already in use.
If you need to change your ports away from the defaults, check out the
configuration documentation:
https://druid.apache.org/docs/latest/configuration/index.html
If you believe this check is in error, or if you have changed your ports away
from the defaults, you can skip the check using an environment variable:
export DRUID_SKIP_PORT_CHECK=1
EOT
exit 1;
}
}

32
examples/bin/verify-java
View File

@ -20,14 +20,36 @@
use strict;
use warnings;
sub fail_check {
my ($current_version) = @_;
my $current_version_text = $current_version
? "Your current version is: $current_version."
: "Make sure that "java" is installed and on your PATH.";
print STDERR <<"EOT";
Druid requires Java 8. $current_version_text
If you believe this check is in error, you can skip it using an
environment variable:
export DRUID_SKIP_JAVA_CHECK=1
Otherwise, install Java 8 and try again.
EOT
exit 1;
}
my $skip_var = $ENV{'DRUID_SKIP_JAVA_CHECK'};
if ($skip_var && $skip_var ne "0" && $skip_var ne "false" && $skip_var ne "f") {
exit 0;
}
my $java_version = qx[java -version 2>&1];
if ($?) {
die "Please install Java 8 or better!\n";
fail_check();
}
# If we know it won't work, die. Otherwise hope for the best.
if ($java_version =~ /java version \"((\d+)\.(\d+).*?)\"/ && ($2 < 1 || $3 < 8)) {
die "Please upgrade to Java 8 or better! Your current version is: $1\n";
if ($java_version =~ /version \"((\d+)\.(\d+).*?)\"/ && ($2 != 1 || $3 != 8)) {
fail_check($1);
}
exit 0;