sdk list java produces no versions available.

[mzallocco]

This is on Windows 11 under cygwin.

$ uname -s
CYGWIN_NT-10.0-26100

$ sdk list java

================================================================================Available Java Versions for Exotic
================================================================================ Vendor | Use | Version | Dist | Status | Identifier
--------------------------------------------------------------------------------No versions available for your platform at this time.
================================================================================Omit Identifier to install default version 25-tem:
$ sdk install java
Use TAB completion to discover available versions
$ sdk install java [TAB]
Or install a specific version by Identifier:
$ sdk install java 25-tem
Hit Q to exit this list view

$ sdk list groovy works as expected.

[unennhexium]

After installing any JDK/SDK the list of versions for specific candidate becomes empty.
I tried it with Java, Scala, Kotlin, Groovy, Maven and Gradle.

groovy example

$ sdk list groovy | head
================================================================================
Available Groovy Versions
================================================================================
     5.0.2               3.0.13              2.4.14              2.0.3          
     5.0.1               3.0.12              2.4.13              2.0.2          
     5.0.0               3.0.11              2.4.12              2.0.1          
     4.0.29              3.0.10              2.4.11              2.0.0          
     4.0.28              3.0.9               2.4.10              1.8.9          
     4.0.27              3.0.8               2.4.9               1.8.8          
     4.0.26              3.0.7               2.4.8               1.8.7          
$ sdk install groovy

Downloading: groovy 5.0.2

In progress...

########################################################################### 100.0%

Installing: groovy 5.0.2
Done installing!


Setting groovy 5.0.2 as default.
$ sdk list groovy | head

$ # Nothing here.

sdkman version

$ sdk version

SDKMAN!
script: 5.20.0
native: 0.7.14 (linux x86_64)

$ uname -a
Linux LAPTOP-PC 6.17.0-6-generic #6-Ubuntu SMP PREEMPT_DYNAMIC Tue Oct  7 7:34:17 UTC 2025 x86_64 GNU/Linux

sdkman config

# Make sdkman non-interactive, preferred for CI environments.
sdkman_auto_answer=false

# Enable colour mode.
sdkman_colour_enable=true

# Check for newer versions and prompt for update.
sdkman_selfupdate_feature=true

# Enable bash or zsh auto-completion.
sdkman_auto_complete=true

# Enable automatic env.
sdkman_auto_env=false

# Subscribe to the beta channel.
sdkman_beta_channel=false

# Use checksums to ensure downloaded candidates integrity.
sdkman_checksum_enable=true

# Configure curl timeouts.
sdkman_curl_connect_timeout=15
sdkman_curl_continue=true
sdkman_curl_max_time=30

# Enable verbose debugging.
sdkman_debug_mode=false

# Disables SSL certificate verification.
# See https://github.com/sdkman/sdkman-cli/issues/327.
sdkman_insecure_ssl=false

# Use sdkman native (rust) implementation.
sdkman_native_enable=true

P.S. @mzallocco please enclose the code and terminal session snippets into tripple-backticks like this

The text describing the issue.
Next to that the example code listing or session capture begins.

```console
$ # Your session comes here.
$ echo 'hello world'
hello world
```

Other issue details and/or version information.

[unennhexium]

Important

Update: Fixed. The issue is not related to the OP's one.

The issue appeared only in zsh sessions, bash was not affected.

1. I debugged __sdkman_list_versions() function with local -; set -x and
   found that the actual curl call was as

   curl --silent --location $'https://api.sdkman.io/2/candidates/java/linuxx64/versions/list?current=25.0.1-tem&installed=current\n25.0.1-tem

   and that was __sdkman_build_version_csv that placed current\n25.0.1-tem into versions_csv as a result of find invocation and the result is not split on \n for some reason.

2. I presumed that IFS was the culprit and checked the initialization script for it.

3. The zsh's default for IFS is <space><tab><new-line><null> and I am actually not setting it elsewhere explicitly. So even though bash cannot store null character in variables it does not need to, since the IFS should be empty.

4. Next I found that my .zshrc has unset IFS line, which should reset the IFS to the default. I ran zsh -f (skipping loading configuration) and checked how unset IFS is actually working. The result is quite confusing, since documentation explicitly mentions that unsetting IFS resets it to the default. Look:

   user@LAPTOP-PC:~
   $ zsh --version
   zsh 5.9 (x86_64-ubuntu-linux-gnu)
   $ zsh -f
   $ echo -n "$IFS" | od -A n -t c
         \t  \n  \0
   $ unset IFS
   $ echo -n "$IFS" od -A n -t c
   
   $ # ^- Empty string.

   I ended up with IFS set to empty string.

5. The solution in my case is to save and restore IFS explicitly as init script does or by one of the other methods mentioned in this answer.

   The init script then works well since the null character is the last one in the IFS and bash probably treats it as IFS string terminator for most split/join operations.

[unennhexium]

@mzallocco, in your case it is the

"${SDKMAN_CANDIDATES_API}/candidates/${candidate}/${SDKMAN_PLATFORM}/versions/list?current=${CURRENT}&installed=${versions_csv}"

endpoint returning such a result.

For example, try to open this link where I changed the $SDKMAN_PLATFORM from linuxx64 to xxx.

Here are the steps that should help to find the reason.

1. You should start debugging by opening $SDKMAN_DIR/src/sdkman-list.sh
   and adding local -; set -x at the very top of the __sdkman_list_versions function.

2. Reload or open new terminal session or run source "$SDKMAN_DIR/bin/sdkman-init.sh".

3. Execute sdk list java again, wait for the result and type q to exit the pager.

4. Check the output on the screen for SDKMAN_PLATFORM and curl ... invocations.

5. Post the lines found at step 4. here, so the maintainers can assist you.

I have no Windows machines, so I cannot debug it myself. Sorry.

[mzallocco]

Here is the output containing curl.

++ __sdkman_secure_curl 'https://api.sdkman.io/2/candidates/java/exotic/versions/list?current=&installed='
++ [[ false == \t\r\u\e ]]
++ curl --silent --location 'https://api.sdkman.io/2/candidates/java/exotic/versions/list?current=&installed='

• __sdkman_echo_paged '================================================================================
  Available Java Versions for Exotic
  ================================================================================
  Vendor | Use | Version | Dist | Status | Identifier

---

No versions available for your platform at this time.

[mzallocco]

$ sdk list java
++ __sdkman_secure_curl 'https://api.sdkman.io/2/candidates/java/exotic/versions/list?current=&installed='
++ [[ false == \t\r\u\e ]]
++ curl --silent --location 'https://api.sdkman.io/2/candidates/java/exotic/versions/list?current=&installed='
+ __sdkman_echo_paged '================================================================================
Available Java Versions for Exotic
================================================================================
 Vendor        | Use | Version      | Dist    | Status     | Identifier
--------------------------------------------------------------------------------
No versions available for your platform at this time.
================================================================================

[SaptarshiSarkar12]

I tried running sdk list java and it works. I think this issue can be closed.

My environment:

• OS: fedora 43 workstation
• sdk version:

  SDKMAN!
  script: 5.20.0
  native: 0.7.14 (linux x86_64)
  

• zsh --version:

  zsh 5.9 (x86_64-redhat-linux-gnu)
  

[mzallocco]

The problem is on Windows 11 running cygwin. ***@***.*** 21:09:14 ~ $ uname -a CYGWIN_NT-10.0-26100 AcerNitro5 3.6.5-1.x86_64 2025-10-09 17:21 UTC x86_64 Cygwin ***@***.*** 21:09:19 ~ $ sdk list java ================================================================================ Available Java Versions for Exotic ================================================================================ Vendor | Use | Version | Dist | Status | Identifier -------------------------------------------------------------------------------- No versions available for your platform at this time. ================================================================================ Omit Identifier to install default version 25.0.1-tem: $ sdk install java Use TAB completion to discover available versions $ sdk install java [TAB] Or install a specific version by Identifier: $ sdk install java 25.0.1-tem Hit Q to exit this list view ================================================================================ /Mauro

…

On Sat, Jan 3, 2026 at 12:00 AM Saptarshi Sarkar ***@***.***> wrote: *SaptarshiSarkar12* left a comment (sdkman/sdkman-cli-native#339) <#339 (comment)> I tried running sdk list java and it works. I think this issue can be closed. image.png (view on web) <https://github.com/user-attachments/assets/94b2dece-cd58-433d-ad2e-2ff68d6c36a3> My environment: - *OS*: fedora 43 workstation - sdk version: SDKMAN! script: 5.20.0 native: 0.7.14 (linux x86_64) - zsh --version: zsh 5.9 (x86_64-redhat-linux-gnu) — Reply to this email directly, view it on GitHub <#339 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABYTSN2YUF7QAJUCSLVXZ334E5EHZAVCNFSM6AAAAACHXNHUYSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTOMBWG4YDENBZGA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[marc0der]

Hi @mzallocco,

The problem is that we don't support cygwin, as described on our installation page here:
https://sdkman.io/install/#windows-installation

On windows we only support Git Bash and WSL, not cygwin.

[SaptarshiSarkar12]

@marc0der Then, we can create a feature to report invalid environment if cygwin is detected. What do you think?